Loki has wrapped up on Disney Plus and saying it changed the game in the MCU would be putting things mildly.
The end result of the former God of Mischief’s adventures with the TVA was the destruction of the Sacred Timeline and the introduction of the Multiverse to the MCU. This is not something that MCU fans have had to contend with before.
That being said, anyone who has read Marvel Comics knows exactly the potential this revelation has for the MCU. The formation of the Multiverse means that everything is potentially canon and that basically, anything is possible.
Loki unleashes the Multiverse
During the course of Endgame, the Avengers jumped around time to collect the Infinity Stones. An accidental side effect of this mission was creating a variant of Loki that escaped with the Tesseract. The Loki series followed the adventures of that variant.
In the final episode, the machinations of Sylvie and the fall of He Who Remains unleashed both the Multiverse and Kang the Conqueror. The truth of the situation is that hints of the Multiverse already started appearing in Endgame itself.
The actions of the Avengers didn’t just create a variant Loki. There is also essentially a variant Gamora now running around, something the TVA didn’t seem concerned about. Like Loki, Gamora had died at the hands of Thanos and a younger version was unleashed by time-travel.
Essentially, the strategy the Avengers used broke the Sacred Timeline on a fundamental level. The reality-bending of Scarlet Witch in WandaVision likely weakened it further. Then, Loki and Sylvie finished it off. And the results will be seen almost immediately.
The Multiverse takes over Phase 4
Fans of the MCU are on the verge of seeing what the final destruction of the Sacred Timeline looks like. Many of the impending slate of MCU films in Phase 4 are already designed to reflect the changes of this all-new Multiverse on reality itself.
The upcoming animated Disney Plus series What If…? will show off what happens when there are ever so slight changes in reality. At this point, it’s entirely possible that fans could see these scenarios have real consequences on the main continuity in some fashion.
It’s already been made quite clear that three Phase 4 movies will also contend with the Multiverse on some level. Spider-Man: No Way Home (2021), Doctor Strange in the Multiverse of Madness (2022), and Ant-Man and the Wasp: Quantumania (2023) will all be impacted by it.
Keeping in mind that extremely little is known about the upcoming Fantastic Four movie, it stands to reason that it will also deal with the Multiverse on some level. Wandering through time and reality is certainly the bread and butter of both Mister Fantastic and Doctor Doom.
Changing the MCU
The reality of the multiverse is that it could easily have an impact on any and all MCU movies and TV series. It literally provides Marvel and Disney with a way to bring anything they want into the main continuity and make it canon.
An easy example of this is the X-Men. Fans have been wondering when and how this massive standalone film universe of stories and characters will arrive. Manipulating the Multiverse gives Marvel innumerable ways to do that, including just declaring the Fox films as canon, even partially.
The same is true of the Marvel Netflix collaborations. Actors like Jon Bernthal, Charlie Cox, Krysten Ritter, and Vincent D’Onofrio have been rumored to be reprising their characters in any number of MCU projects. Like the X-Men, changes to the Multiverse provide an opportunity to bring them in.
Having the Multiverse at their disposal opens the door to a lot of storytelling options. That even includes an avenue to bring Natasha Romanoff back into the land of the living as the Black Widow. Starting in Phase 4, the rules of the MCU are suddenly a lot different.