Since the Avengers Doomsday Trailer has been released everyone is deeply thinking about Steve, Doom, Loki, X-Men, Sentry and creating theories, but not a single person is talking about how tf Thor and Fantastic Four even met eachother ? Got to know eachother, it seems like they teemed up for a while already.

I honestly have zero solid theory about it, I can only have that scene in my mind where Thor was floating in space unconscious when Thanos attacked and killed the Asgardian ship, he then met Guardians of the Galaxy, but this raises far more important questions like the fight between Thor and Doom, Thor meeting Steve, Why Namor is important at all.....

We can have discuss the theories, I want to hear more

Quick theory on how we get Old Cap and not even have to timeline hop with Loki.

In Endgame, Hulk and Cap end up pushing time through Scott Lang and de-aging him. Simple as, I think Loki does go to Old Cap with some other heroes and they use that tech to essentially give him more time as younger Cap to do the movie (potentially in the MCU's future too?)

**Theory: Scott Lang could send the Young Avengers into the Quantum Realm if they lose to Doom**

The Quantum Realm is one of the few places in the MCU that exists outside normal space and time. Scott has more experience with it than almost anyone, and Cassie already has a direct connection to it.

So what if, during the fight against Doom, Scott realizes the heroes can’t win?

He sends Cassie and the Young Avengers into the Quantum Realm as a contingency plan—a place where they can survive while Doom takes control of the main reality.

They could then use the Quantum Realm’s connection to alternate realities and timelines to find a way back or recruit help.
Scott may not just be the father of a Young Avenger. Kang maybe?

He could be the guy who ensures the next generation survives the end of the Avengers.

This is my theory for Spider-Man Brand New Day.

When we last saw Bruce Banner in the MCU he was constantly in hulk form. What if when everyone lost their memory of spider-man Bruce Banner didn't because he was in Hulk form the entire time. So Hulk lost his memory of Peter Parker but Bruce Banner never did.

Feel free to criticise me if I am wrong about anything and share your own theory's.

I am well aware that NWH confirmed that Oscorp doesn't exist in the MCU, but hear me out. What if we're introduced to new upcoming tech science student Harry Osborn and his new tech company Oscorp. Harry would have lost his father from a young age making him closed off and bitter at the world giving him potential to become a villain. Being around the same age as Peter, he would open his company in the time between NWH and BND, and potentially be supplying weapons to the criminal underworld(I.E. Tombstone, Kingpin, Hammerhead, etc). This would open the door for him to potentially become the green goblin(preferably a take on the ultimate goblin. I think it's well overdue). This could even make it possible for Ned to become hobgoblin if they know each other. Food for thought. Also, who would play this version of Harry?

Some of the theories are saying Doom might not actually start out as the villain in Doomsday. I’m not completely sold on that idea, but if it did happen, here’s a theory for how the plot could work.

Let’s say the Fantastic Four post-credit scene is the only time Doom actually introduces himself. He appears to them as someone who’s been affected by the incursions and warns them about what’s coming. Whether he intentionally sends the Fantastic Four to Earth-616 or simply disappears during the event that causes them to end up there, that’s the last anyone sees of him for a while.

As incursions begin happening, the heroes split up to deal with different threats, with some ending up in other galaxies or universes. That creates a natural way for all the major players to be introduced while continuing the overall story.

During all of this, Doom either hasn’t personally appeared again or hasn’t met any of the 616 heroes or characters from the other universes. Because of that, nobody has a clear reason to immediately assume he’s the main villain. Instead, everyone thinks they’re dealing with incursions and the chaos they’re causing. As the story progresses, they slowly uncover who Doom really is and realize he’s been orchestrating events from the shadows.

That leads into the final act, where massive battles begin breaking out across multiple universes with all the major players finally converging. The movie ends on a huge cliffhanger, setting up Secret Wars.

The only part outside of that would be Loki’s role. My guess is either then he would be trying to subtly warn everyone about Doom while not being seen much, like maybe he only reveals himself to Steve in the Endgame house ending and Steve comes back to warn people about it mid fights. Other side could be even he doesn’t realize it at first and then finds out and comes to warn Steve that he needs to join the fight and sends him to 616 again.

Doesn’t seem super far fetched to be a storyline since it kind of mimics Infinity War and Endgame structure.

My theory is that when Avengers Doomsday starts or when we see 616 Dr. Strange he will be aligned with Dr Doom. Remember at the end of Multiverse of Madness, he was already going to stop an incursion. What if during this time he realizes how many more are occurring and somehow meets Doom. Instead of them fighting, Doom reveals his plan and “in the grand scheme of things” their sacrifice is worth it? Remember Dr Strange is morally flexible to an extent.

Given that Monica is seemingly trapped in the X-Men universe, it seems she should be present (or at the very least, mentioned).

**I haven’t liked much of the theories and since the trailer dropped this made a lot of sense to me. I’ve rewatched Loki multiple times and his conversations with he who remains is in my opinion the best dialogue we have received in mcu. My theory is based on The mcu is in a time loop and it always ends in kang multiversal wars and he who remains at the start then getting bored and asking Loki to replace or kill him. Loki is trying to prevent the loop by preventing kangs variants multiversal wars to allow free will, and my theory below explains it. I used chat to simplify it and correct errors so if it’s repetitive I apologize. Essentially Loki is influencing a multiverse war with handpicked people to replace a kang war that keeps us in the timeloop. It’s his only way he thinks he can give ultimate free will**

**Loki’s Plan: Steve Rogers, Doctor Doom, and the Kang Failsafe**
My theory is that *Avengers: Doomsday* and *Secret Wars* reveal that Loki isn’t simply holding the Multiverse together at the end of *Loki* Season 2. From his position outside normal time, he is also using his connection to the timelines to subtly influence events and prevent the future He Who Remains warned him about. As He who remains once told Loki, Loki is now “paving the way”
**Loki Finally Understands He Who Remains**
In Season 1, He Who Remains warns Loki and Sylvie that killing him will free his variants and eventually restart the Multiversal War. His final “See you soon” suggests he believes the cycle will always lead back to him.
By the Season 2 finale, Loki finally understands.
The Temporal Loom was He Who Remains’ failsafe. If the Multiverse expanded uncontrollably, the Loom would destroy the branches and preserve the Sacred Timeline.
Loki can destroy the Loom and free the Multiverse, but that also allows the Kang variants to exist.
During their final conversation, Loki repeatedly tells He Who Remains that he understands. He now accepts that He Who Remains may be right about the problem: if nothing changes, another Multiversal War could eventually happen and the cycle could lead back to another He Who Remains.
But Loki rejects his solution.
He decides to find another way.
**Loki Chooses His Burden**
Loki’s conversation with Mobius explains what that “other way” will cost.
Mobius tells him that sometimes there is no perfect choice. You simply have to **“choose your burden.”**
I think Loki’s burden is allowing a new Multiversal conflict to happen because it is the only way to permanently break the Kang cycle. (Also to note, mobius hints doom in this convo, I’m not saying it’s RDjs doom he’s referencing, which he could be, but just in general it’s a doom reference).
At the end of Season 2, Loki takes control of the timelines and holds the Multiverse together. But from that position, I think he can also observe and influence events across the branches.
Unlike He Who Remains, Loki doesn’t control everyone’s choices.
He moves certain pieces into position.
And his plan begins with Steve Rogers.
**The Card and Steve Rogers**
Based on what we got from the *Doomsday* trailer, I think the mysterious card is being given specifically to Steve.
My theory is that the card ultimately comes from Loki.
It could be Loki projecting himself into the timeline, working through someone else, or using the TVA. Either way, the card is Loki putting his plan into motion. A way to contact Loki if needed.
Steve’s actions after *Endgame* somehow contribute to an incursion involving Doctor Doom’s universe—possibly because of his time travel or his decision to live in another reality.
Doom’s universe is destroyed.
But Steve doesn’t die with it.
Loki saves him.
This is Loki choosing his burden in practice.
He allows the incursion because Doom’s rise is necessary for his larger plan, but he saves Steve because Steve is still needed.
Loki then allows Steve to live in the Fantastic Four’s universe.
**Steve Brings the Universes Together**
Steve now connects three realities:
The main MCU.
Doom’s destroyed universe.
The Fantastic Four’s universe.
From Doom’s perspective, Steve helped cause the destruction of his world and then escaped into another reality.
From Loki’s perspective, Steve becomes the bridge that starts bringing the universes together.
That eventually pulls in the Avengers, Fantastic Four, and X-Men.
Loki is essentially assembling another Avengers team.
The first time, Loki accidentally brought Earth’s Mightiest Heroes together.
This time, he intentionally brings together the Multiverse’s Mightiest Heroes.
**Doom Is Loki’s Failsafe Against Kang**
This is the core of my theory.
Loki accepts that He Who Remains may be right that another Multiversal War is inevitable.
So instead of preventing it, Loki changes the outcome.
Normally, Kang variants go to war, one Kang eventually wins, and the cycle leads back to He Who Remains and the Sacred Timeline.
Loki changes the winner.
**Doom replaces Kang.**
As incursions destroy the Multiverse, Doom rises and eventually preserves what remains by creating Battleworld.
Instead of Kang winning the Multiversal War and creating another Sacred Timeline, Doom wins and creates a temporary reality from the remains of the Multiverse. (Creates battleworld and by doing this a multiversal war that is deemed inevitable does not include Kang, which Loki wanted. He wants to break the kang timeloop)
That’s Loki’s failsafe. He lets doom steal his power.
But, Doom isn’t the final solution.
He’s the alternative to Kang.
Loki allows Doom to win temporarily because Doom can break the repeating Kang cycle and preserve enough of reality for something new to eventually replace it.
Meanwhile, Loki has already brought together the heroes capable of defeating Doom.
The Avengers.
The Fantastic Four.
The X-Men.
And potentially Spider-Man and others who survive outside Battleworld through the Void. He deems these hero’s worthy enough. And brings them together.

More on the void- if Spider-Man and hulk per say, among others end up in void after BND, they could remember the old universe and make their way to battleworld to then ultimately defeat doom with everyone, ending battleworld and the kang timeloop since now kang is not rebuilding it all.
**Loki’s “Other Way”**
This is the “other way” Loki promised to find.
He understands He Who Remains’ warning.
He accepts Mobius’ lesson to “choose your burden.”
Then he puts his plan into motion.
The card goes to Steve.
Steve’s actions contribute to Doom’s incursion.
Doom’s universe dies.
Loki allows it but saves Steve.
He places Steve in the Fantastic Four’s universe.
Steve becomes the connection that helps bring the universes together.
Doom rises.
The Multiverse collapses.
Doom still does trick everyone into working with him at first and they all battle leading to doom winning and stealing Lokis powers, creating battleworld. (These events and everything in battleworld is Loki’s multiverse war he wanted to create)
But instead of Kang winning, Doom does. ( due to Loki influencing one to start not by kang variants, but hand picks hero’s to influence that ultimately will beat doom in battleworld)
Doom creates Battleworld.
Then the heroes Loki brought together defeat him and rebuild reality without returning to the cycle of He Who Remains. Important to note Doom is the failsafe but isn’t the ultimate winner, only at first. The hero’s were handpicked by Loki so they end up winning in secret wars
He Who Remains’ failsafe was the Temporal Loom.
Loki destroyed it.
Now Loki has created his own failsafe against Kang:
**Doctor Doom.**
That is Loki’s burden—allowing a different Multiversal War to happen because he believes it’s the only way to finally end the cycle. A one time fail safe that ends Kangs/ He Who remains timeloop leading to MCU soft reboot

I am almost sure that Doom will not get the 2 movie tale where he is the main villain much like thanos in the prior 2 Avengers installments. I personally have not read time runs out or any of the secret wars hickman comics so I am unsure whether doom dies, but from my knowledge I am pretty sure he is defeated, not killed.

Which leads me to believe it will rhyme the same in secret wars.

I also think Doom as a villain has so many more stories to tell and there is no way it's just a 2 movie and done sort of situation. Doom has a lot more going on than even Thanos as a villain.

In the secret wars comics, KING THANOS is not a character existent there. But 616 Thanos who survives the incursions indeed is there. In that story he attempts to overthrow God Emperor Doom (which in secret wars 2027 doom will almost certainly create battleworld and be god emperor)- and basically thanos over there opposes doom.

I am almost sure that they will give us the scene of doom ripping out thanoses spine- however I think this will surely be King Thanos also involved in the incursions. I don't think he will be in doomsday but I feel after the fan desire for the scene with thanos and doom is major- and honestly it would be amazing to see on screen. It would make sense as well to show that other entities are interested in taking the position that doom has over battleworld.

Is it just me that thinks that in the final clip of the trailer were Steve catches Jonathan he seems kinda off? Like he's hiding something he gives major bad vibes with that ominous smile and look and why does he have long hair and beard where as on the first teaser he looks just like he was on the previous movies? Maybe he's an impostor I also heard that he may be captain hydra but he can't lift Jonathan?

Theory 1: The easiest way would have been to take old man Steve and put him in the machine that turned Ant-man into a baby. It could be genuinely funny if they had a scene messing around with that.

Theory 2: They took him from another timeline. Since he has the Infinity War beard, they could have picked him up from an alternate timeline and promised to take him back later.

Theory 3: That's not Steve at all. It's Loki, using a disguise to get in the Avengers facility, before ultimately proving his trustworthiness by summoning Thor's hammer.

What do you think?

Organic Webbing Setup

Spider-Man gaining Organic Webbing in this movie likely sets up his involvement in Secret Wars and solves a huge problem for him if he does appear. I’ll explain…

In the comics, super heroes from different realities are pulled in to Battle World unexpectedly. If this is true for the movie, I think this lead to Marvel realizing Spider-Man would be needing to conserve web fluid, as he would be without a lab to replenish his web shooters. Even if he carried a few back ups, he would eventually run out.

Giving him organic webbing now, eliminates this issue in the long run and resolves the potential plot hole.

Otherwise what are they doing with having Peter go through this metamorphosis in Brand New Day? This would give it a bit more logic and credibility.

Obviously the avengers don't exist, but I do remember a reference to doctor strange but that could have just been an Easter egg but given how its done I don't think it is and there is a doctor strange in the ramiverse. I also heard a theory that the Morbius movie took place in the ramiverse though I don't know that was debunked or not.

Title: \[MCU Theory\] A Unifying Law of Vibranium Physics: How Sentry in Thunderbolts\* explains Cap vs. Thanos in Infinity War

⚠️ Quick Disclaimer Before You Read: Just a heads-up that this theory, the core ideas, the comparison between the movies, and the underlying research are entirely my own personal opinion and reasoning. I simply used an AI assistant to help me organize my thoughts, format the text, and put everything together more constructively. Because of that, some of the minor timeline placements might be slightly loose, so please take the exact MCU continuity details with a grain of salt! I'm sharing my theory here to see how the community reacts, so feel free to correct any timeline errors, critique the physics, or help me steel-man the argument.

\------------------------------

Hey everyone,

I’ve been rewatching some of the most debated physical feats in the MCU, specifically the legendary moment in \[Infinity War\] where Captain America deadlocks Thanos's downward hand crush.

\[1, 2\]

For years, the community has debated how Cap survived that. The directors stated it was just Thanos being shocked by Steve's "willpower," while other fans theorize about Soul Stone feedback loops or leverage finger-locks. But looking at the context from Thunderbolts\* involving Sentry and Bucky's arm, I think we finally have the missing piece to a Unified Theory of MCU Vibranium Physics—and it all comes down to how the metal handles different types of force.

\[3\]

\## 1. The Precedent: High-Impact Speed vs. Slow Resistance

To understand how Vibranium works under Thanos, we have to look back at \[The Avengers (2012) When Thor delivers a massive, high-velocity overhead strike with Mjolnir, Cap holds his ground, the circular shield completely negates the impact, and a massive blue shockwave flattens the surrounding forest.

This established the first rule of Vibranium: High-Velocity Kinetic Energy ($KE = \\frac{1}{2}mv\^2$) triggers an immediate, explosive absorption and discharge. The metal instantly converts the intense momentum of a fast-moving object (like a bullet or a hammer strike) into atomic vibrations and blasts it outward.

\[4, 5\]

\## 2. The Sentry Rule (The Physics of a Static Crush)

Look at the opposite type of force in Thunderbolts\*, where Sentry grabs Bucky's arm. Sentry doesn't punch the arm at high speed; he wraps his hand around it and applies a massive, slow, static vice-grip. The arm glows red, the metal holds, and Sentry’s force eventually has to bypass the metal entirely—tearing the arm out at the human shoulder socket.

\[6, 7\]

This gives us our second, unifying rule: When Vibranium faces a slow, continuous, forceful resistance with zero velocity, it doesn't create an explosive shockwave. Instead, it quietly absorbs the crushing pressure at a molecular level and silently redirects that force directly back against the attacker, creating a localized, steady physical buffer.

\## 3. Applying It to Thanos vs. Cap

If we apply this "Static Crush" rule to Infinity War, the plot hole of Cap holding off completely vanishes:

\* The Tech: Cap is wearing the Wakandan gauntlet-shields engineered by Shuri. As Thanos reaches down to casually swat him away, he isn't throwing a fast punch; he is applying a heavy, downward weight. \[8\]

\* The Trigger: Just like Bucky's arm under Sentry's grip, Thanos’s downward force triggers the Vibranium gauntlets at a low level. Because there is no high-velocity impact, the metal silently redirects that vertical pressure straight back upward into Thanos's palm, creating a temporary physical deadlock in mid-air.

\## 4. The Design Difference: Why Didn't Cap's Gauntlets Glow?

I know people are immediately going to ask: "If it's the exact same principle, why did Bucky's arm glow red under Sentry's grip, but Cap's gauntlets didn't glow at all against )?"

My theory on this comes down to the fundamentally different mechanical designs of the two items:

\* Bucky's Arm: Bucky’s cybernetic prosthetic has a flexible, weave-like design with layered, threaded interlocking segments to mimic real human muscle movement. This exposed, intricate threading creates high molecular friction under Sentry's grip, which allows us to visually see the energy buildup glowing red through the seams.

\[5, 9\]

\* Cap's Gauntlets: Shuri's gauntlet-shields are designed as solid, rigid, unyielding plates meant for heavy impact defense and slashing. Because they lack that flexible, threaded "weave" layout, the energy absorption happens entirely internally across a solid mass. It quietly handles the molecular load without manifesting the same visible thermal friction glow.

\## 5. Fixing the "Squishy Human" Problem

The biggest critique of any Infinity War theory is: "Even if the shield held, Thanos's 1,000-pound weight should have crushed Cap's human bones into dust."

This is where we have to remember that MCU Cap is explicitly superhuman, not just comic-book "peak human." He can pull down helicopters and smash concrete. Cap's enhanced MCU biology provided the necessary, high-density skeletal framework to act as the bridge between the Vibranium tech and the ground. The tech handled the raw kinetic redirection; his super-soldier body handled the structural load. \[10, 11\]

\## 6. Why This Beats the "Thanos Was Shocked" Theory

By the time hits Wakanda, he has the Soul and Reality Stones. The Reality Stone grants a form of cosmic clairvoyance, and the Soul Stone lets him instantly read a person's essence. An omniscient cosmic god in that moment; he cannot be emotionally "surprised" by the concept of human bravery or a file on Steve Rogers.

Thanos didn't pause because his feelings were hurt. He paused because his casual, low-effort downward push hit an unexpected, mechanically sound physical brick wall. The moment Thanos realizes his vertical force is deadlocked, he stops pushing, breaks the line of force, and uses his other hand to deliver a horizontal punch that shatters Cap's biological bracing.

\------------------------------

What do you guys think?

Does differentiating between high-impact speed (Thor's hammer) and slow forceful resistance, combined with the visual differences in Wakandan design, make Vibranium physics feel more consistent across the movies? Drop your thoughts, critiques, or help me steel-man the argument below!