the next big mcu story arc shouldn't happen until they fully build up and cement the new team members, like t'challa and carol
things like the falcon & winter soldier series should help out with that
i just want them to be patient and start small, kinda like how they started the mcu in the beginning. i mean if it ain't broke don't fix it yeah
it looks like they're going that way too, with the next couple movies being solo movies, prequels, and new character introductions
Next Avengers movie should definitely be just to show "these are the new Avengers" just like the original was. The focus shouldn't be a new threat just yet but rather who our main heroes are and to show that the Avengers still live on despite the founding members being gone.
Because as it stands right now, only Spidey and Falcon are really gonna be working as Avengers for now, the other characters have their own problems to deal:
Scott really needs to catch up with his daughter.
T'Challa has his own country to take care of.
Strange has extra-dimebsional **** to deal with.
Carol has the rest of the galaxy to take care of.
And the Guardians are probably not gonna play any bigger role in anything Avengers related for a while.