I have no idea. I lost interest in marvel after Endgame. since this is a multiverse movie, I bet they find a way to bring back Iron Man at the end of the movie.
SHE-HULK, Wanda, Shang-Chi, Sam Wilson, THOR(Most likely an appearance from Deadpool and or Wolverine to put it over). Unless you're really up on the Disney+ shows, then this lineup will contain 2nd and 3rd Tier Heroes to give them an opportunity so the left doesn't have a fit over it
2nd or 3rd tier heroes? You mean like Iron Man, Thor, Captain America, Hawkeye, and Black Widow? Besides the Hulk, the entire Avengers lineup was made up of C-List and D-List Marvel heroes, because they'd sold all their popular ones to other studios. If you asked the average man on the street to I.D. the Avengers in 2006 nearly no one would have been able to name any of them other than the Hulk, and god forbid you showed them the Guardians of the Galaxy, Doctor Strange, Black Panther, or nearly anyone else from the MCU. You'd have received a lot of blank stares.
Marvel has proven time and again that they can take characters no one knows about and turn them into household names simply by putting them in good movies. Before Avengers:Doomsday, they'll have released a new Captain America film and their first Fantastic Four film, as well as a Thunderbolts, which seems akin to GotG in its obscurity, and Blade.
That gives a solid roster of heroes to pull from:
Black Widow (Yelena)
Captain America (Sam)
Hawkeye
Hulk
Thor
Loki
Bucky / Winter Soldier
Spider-Man
Wolverine (potentially all the X-Men)
Deadpool
Guardians of the Galaxy
Black Panther (Shuri or someone else)
Shang-Chi
She-Hulk
Doctor Strange
Captain Marvel
Ms. Marvel
Moon Knight
Ant Man
The Wasp
Fantastic Four
Blade
Scarlet Witch
Red Guardian
Daredevil (we saw Matt Murdock in Spider-Man)
There are plenty of possibilities. Plus, Secret Wars was equally about the villains, so there is massive potential for interesting stories there.
The writing back then was much better than it is now. It wasn’t flawless or anything, but the older movies are masterpieces compared to the crap we got after phase 3. The original Avengers line-up did consist of C and D-listers until they were elevated to A and B-list, thanks largely to skilled writers and actors. You can’t really say the same now.
The people they’re hiring these days don’t have the skill to make the current roster as likable as in the first 3 phases. They care more about checking boxes than they do making a cast that people actually like.
In theory, they could. But they won’t, because they can’t.