I mean, they've already supposedly drawn up plans for the next 20 movies after this phase ends with Avengers 4.Sounds terrible...
Also worth noting that Sebastian Stan (aka Bucky) signed a 9 movie deal originally, so he could easily end up being Captain America after Chris Evans, since he'd still have a bunch of movies left.
Yeah that's a possibility; I think they'll change their original plans; like I said above, Marvel had already planned another 20 movies after Avengers 4, but that's probably before this Fox purchase came to light.Honestly, a way I can see X-Men intergrated, is from aftereffects from the battles of Infinity War (and presumably Infinity Gauntlet) causing people all around the world to start getting mutations, and with government programs starting up to prevent if the Avengers turns.
It could then lead the way to Origins for Wolverine, Mystique, Professor X and Magneto and more mutants with more possible ease, with it being different than the Singer/Fox X-Men universes.
They can easily slot X-Men into there, and Scarlet Witch-Magneto is a natural connection as well.