Avengers: Endgame upped the ante not just for the entire franchise, but for the genre of superhero films in general. However, in doing so, the franchise might also have made it impossible for themselves to top what has been done. The Marvel Cinematic Universe might have a lot of trouble setting up another finale like Endgame, but a theory suggests that it might already have its cards ready for Avengers: Secret Wars.
Avengers: Secret Wars is set to be the event that will be the culmination of the next 10 years of the Marvel Cinematic Universe. Audiences expect a lot from the film, especially how Marvel Studios is going to top the Avengers Assembling from Avengers: Endgame. A new theory has come out, pointing towards Marvel Legacy, and how it might allow Secret Wars to not only match but also outdo Avengers: Endgame.
Avengers: Secret Wars could bring in non-MCU Marvel characters
According to the theory, Avengers: Secret Wars would not only have a final confrontation between Kang and the Heroes of the MCU but also bring in villains and allies for Kang and our heroes from non-MCU Marvel films, such as Ang Lee‘s Hulk, Both iterations of the Fantastic Four under Fox, The X-Men, Nicolas Cage‘s Ghost Rider and Wesley Snipes‘ Balde.
Aiding Kang, on the other hand, could be villains of Marvel movies past, like Doctor Doom from 2005’s Fantastic Four, a young Magneto from X-Men: First Class, Both iterations of Jean Grey, infused with the Pheonix Force, Mephistopheles from Ghost Rider, and even others, who Kang could have made his lieutenants in a fight against the Avengers, X-Men, Fantastic Four and other assorted heroes.
Avengers: Secret Wars would change the paradigm of the Marvel Cinematic Universe
Seeing as the X-Men do not exist within the MCU, but in other timelines and realities. To make sure that Avengers, Mutants, and the Fantastic Four all exist in the same universe so that the Multiverse Saga can be put to rest, it is important that the end point of Avengers: Secret Wars somehow unites the universes into a single timeline, such all these superhero factions co-exist in the same universe.
This could come in the form of some sort of multiversal reorganization, causing either the X-Men or the Fantastic Four universe to be destroyed (perhaps due to some incursion) or united into a single timeline, such all the histories of these characters remain intact, but inter mingle with death other, changing how everyone remembers the past.
We may receive a special presentation showing key moments from the history of the MCU, but now with all the new canon that will welded into it. Perhaps we will see the Battle of New York where the Fantastic Four and the X-Men aid the Avengers, and how that might have changed some parts of MCU’s history.