Titanfall looks great and having an Iron Man campaign with Iron Man suits pvp multiplayer sounds like a Respawn Entertainment job for me.
Ghosts of Tsushima reminds me of Iron Fist a lot and I think Sucker Punch is a good team to do an Iron fist game.
This is my least favorite idea but “outlaws in the galaxy” or “guardians of the galaxy” sounds like something Rockstar would be willing to make.
A World War 2 campaign and semi-open world with Captain America sounds pretty fun coming from the guys behind the Batman games.