10 Movies We Want In Marvel Cinematic Universe Phase 4
6. New Avengers
Characters can live forever on the page, but on the screen, the torch eventually needs to be passed.
Actors like Robert Downey Jr and Chris Evans won't want to play their characters until the end of time, and that means the original six Avengers will, at some point, all be swapped out for newer models.
We've met several of these new team members already, but a standalone movie that fully brings them all together and sets the stage for the future of the MCU could be something that features in Phase Four.
But who might this new team of Avengers consist of? Spider-Man is a given - Tom Holland's young age ensures he'll be around for decades - and heroes like Black Panther, Captain Marvel, The Wasp and Doctor Strange will probably have a part to play too.
This doesn't mean that the original six Avengers have to die; a New Avengers movie could simply see Tony, Cap, Thor, Widow, Hawkeye and Banner moving on, leading to the newer heroes forming a super-team in their wake.
Whatever the Avengers team looks like by the end of Phase Four, a reality where it consists of an entirely fresh batch of heroes - especially as Marvel introduces new characters and slowly moves older ones out of the spotlight - is inevitable.