I just don't see how they are going to fit all the characters in a 2 hour movie in Infinity War part 1 and make it work. It just seems like a clusterfluck to me waiting to happen.
Nick Fury
Iron Man
Cap
Spiderman
Thor
Hulk
Black Widow
Hawkeye
Scarlette Witch
Quicksilver
Antman
Falcon
Iron Patriot
Pepper
Starlord
Gamora
Drax
Rocket Raccoon
Groot
and that's just part 1.
Then you gotta add
Black Panther
Captain Marvel
for part 2.
I don't think that everyone will per se show up in Part 1, thus it have been split into two parts, to give enough time to everybody. I can't see them cramming every single one of their characters into a 2-3 hour movie. But who knows what they'll be up to.