Yeah, i am sure Captain Marvel will have a big role in all of it. In the comics, its Nebula that is key to defeating Thanos. She steals the gauntlet while Thanos has become Eternity. But then she wants to take over the universe, and so Thanos realizing his mistakes joins the heroes to defeat Nebula.
Which i can see some similarities in the movie.
Thanos tortured the crap out of Nebula, and i am sure she's more pissed than ever, plus he killed Gamora. Thanos is now off in his peaceful place with the gauntlet looking destroyed, but the stone still exist and are fine. I don't think the heroes will be going after Thanos to get "his" stones, they have no idea where he is. So i think they need to find a way to get their own stones. Thats why we see them back in NY with Loki in the set pics. They must be trying to get alternate versions of the stones? Maybe Dr. Strange as he time traveled in IW left clues how to gather them?
Will the Ant Man/Wasp movie play a role in how they are able to travel back in time or to another dimension?
We saw the mold of the gauntlet in IW, so you think the heroes might need to make another and Thor has the connection to that. I can see Nebula playing along with the heroes, but once they gather the stones and new gauntlet, she steals it. I mean they show Thanos torturing her, she's been a key role in the Thanos story. I just think she must continue to be part of all of it.
But all that said, what they seem to do is use the comics as a starting point, but then they change things up.