Summary
A newThe Fantastic Fourtheory claims Doctor Doom has been in theMarvel Cinematic Universeall along, with a major mission in the Multiverse Saga. Doctor Doom is the most popular villain of the Fantastic Four, and the character has shown time and again in Marvel Comics that he is not only the team’s biggest threat, but also a villain whocan serve as an overarching foe to the entire Marvel universe. As such, even thoughThe Fantastic Four’s castdoes not include Doctor Doom at the moment, the character can never be discarded.
Adding to that, Doctor Doom has appeared inall the live-action Fantastic Four moviesso far, so there is a bigger chance that he will play a role in the MCU’sThe Fantastic Four, even if it is just as a cameo or supporting role, than Doom not appearing at all. WhileGalactus has been reported to serve as the main villain of the movie, there is a new theory that claimsThe Fantastic Four’s storymight secretly include Doctor Doom for a major Multiverse Saga reveal, and it would change MCU history in an interesting way.

The Fantastic Four Is The MCU Multiverse Saga Movie I Have Been Waiting For
After many movies and shows were released in recent years, The Fantastic Four is the MCU film that I have been waiting to see in the Multiverse Saga.
The Fantastic Four Theory: Doctor Doom Will Destroy Another Universe
Doom Has Been In The MCU All This Time
The MCU is gearing up for the arrival of some of the biggest movies in the Multiverse Saga thus far, and after this year’sDeadpool & Wolverine— which is a bona fide multiverse event — 2025’sThe Fantastic Fouris the next major film that could be related to the multiverse. The film is rumored to take place in an alternate universe, which would mean that Pedro Pascal’s Reed Richards and the rest of the Fantastic Four are not part of the MCU’s Earth-616. However, anewThe Fantastic Fourtheory claims Doctor Doom has been in the MCU.
According to the MCU theory shared on Reddit by userCidwill, the Fantastic Four and Doctor Doom would come from different universes, with Victor von Doom having always been in the MCU’s Earth-616. Doctor Doom would be revealed to have a major role in the Multiverse Saga, withthe villain being responsible for protecting the MCU’s main Earth from incursions. Incursions are events where two universes collide and one or both are destroyed, being introduced in the MCU inDoctor Strange in the Multiverse of Madness.Doctor Doom would have been destroying the other universes as incursions with Earth-616 occurred.

The Fantastic Fourtheory proposes that the team’s universe and Earth-616 would come together in an incursion, which would see the Fantastic Four and Doctor Doom meet for the first time. Doom and Reed Richards would attempt to work together to find a solution, but the villain would turn on him and destroy the Fantastic Four’s universe. That would lead to the team and a handful of other characters finding refuge in the MCU, setting up their role among other heroes, andthe start of Reed’s major rivalry with Doctor Doom.
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How Galactus Would Fit In The Fantastic Four If Doctor Doom Plays A Big Role
The Devourer Of Worlds Is Confirmed For The MCU Movie
IfThe Fantastic Fourtheory were to come true, then it would certainly impact what has been revealed of the film so far. For now, Doctor Doom has yet to be confirmed as part of the MCU’s Fantastic Four reboot.Ralph Ineson has been cast as Galactus, with the character reportedly serving as the film’s main villain. AsThe Fantastic Fourtheory proposes that Doctor Doom would have a major role to play in the movie, that directly clashes with reports about Galactus' role. However, there is still a way for both to work together in the film.
Doctor Doom could be the one to make Galactus come to the Fantastic Four’s Earth. In order to destroy the team’s Earth and save the MCU’s Earth-616 in a possible incursion, Doom could use an energy source to lure Galactus in the direction of the Fantastic Four’s Earth. This way, the cosmic being would devour the team’s world and open the door for the Fantastic Four to escape onto Earth-616. There are also theories that Galactus could receive a power boost in the MCU, eating universes instead of just planets, which would fit Doctor Doom’s possible plan.

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Every Clue The Fantastic Four Takes Place In Another Universe Explained
There Are A Few Teases
The actual plot ofThe Fantastic Fourhas yet to be revealed. That said, Marvel has released plenty of teases about the movie’s setting, serving as fuel to theories that the team will come from an alternate universe. When revealingThe Fantastic Four’s core cast, Marvel Studios released official concept art of Pedro Pascal’s Reed Richards and the rest of the team with their suits. The aesthetic of the piece and details like the newspaper The Thing readheavily hint at the movie taking place in the 1960s. Another official concept art further teased that direction.
The Fantastic Four’s Human Torch postershowed the skyline of a retro-futuristic city that would not be possible to exist in Earth-616’s past. Adding to that,Julia Garner has been cast as the Shalla-Bal version of Silver Surfer. Since the character comes from the Earth X comics run, Marvel could be saving the main Silver Surfer, Norrin Radd, for a future Fantastic Four film in the main MCU. Coming from another universe would also explain where the Fantastic Four have been more easily, with the team not choosing to avoid major MCU events like Thanos' crusade.

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The idea that the MCU’s Fantastic Four movie will be set in an alternate universe could fix a longstanding problem seen in most superhero movies.
Why The MCU Needs To Introduce Doctor Doom As Soon As Possible
Avengers: Secret Wars Is Coming
Following thefiring of Kang the Conqueror actor Jonathan Majors,the MCU is currently without a main villain for the Multiverse Saga. While a new actor could be cast as Kang — or multiple as him and his variants from the Council of Kangs — there is a chance that Marvel could pivot to another major villain. Doctor Doom emerges as the next best possible option to serve as the main antagonist of the Multiverse Saga, and a debut inThe Fantastic Fourwould get him ready for a role in 2027’sAvengers: Secret Wars.
10 Wasted MCU Actors Who Could Be Recast As Doctor Doom
With the announcement of The Fantastic Four’s cast, attention turns to who will play Doctor Doom, and Marvel might already have the solution in-house.
In the comics, Doctor Doom was incredibly important to the story of both major Secret Wars events. The MCU could repeat that, making the villain the major threat to the entire MCU that he is to the Marvel universe in the comics.The Fantastic Fourtheory would establish Doctor Doom as a player with multiverse knowledge who has the necessary experience and power to take control of the MCU’s Multiverse Saga and lead to the creation of Battleworld and the rumored MCU reboot, just like what happened in 2015’s Marvel Comics Secret Wars event.

The Fantastic Four: First Steps
Cast
The Fantastic 4: First Steps features Marvel’s First Family navigating their dual roles as superheroes and family members in a 1960s-inspired, retro-futuristic world. They defend Earth from a formidable space god, Galactus, and his enigmatic Herald, Silver Surfer, testing their familial bonds and heroic resolve.
