There Are Multiverses in the MCU Now
After all of the time-traveling and Infinity Gauntlet snapping action that occurred during Avengers: Endgame, there was bound to be alternate dimensions and universes that cropped up, simply because of all of the changes that were made.
Captain America stayed back in time to be with Peggy, Loki took the Tesseract in a different scene, and somehow, even Mysterio managed to come into Spider-Man’s world thanks to a tear in the dimension due to the snap.
While Nick Fury is explaining the alternative dimension to Peter, he asks the question that we all need answers to: “Are you saying there’s a multiverse?”
If this is the case, then Far From Home is the first film to tackle one of the many alternate dimensions that are out there now. Due to this idea, it opens up the door for other upcoming MCU films to tackle a similar narrative.
This idea of “multiverses” has since been done in the Marvel comics, but bringing it to the cinematic universe would be interesting to say the least.