Ant-Man and The Wasp is meant to be a very significant film in the MCU. First off, it’s the first film in the MCU to have a female lead in the title, and, it’s one of the few Phase 3 movies that will deal with the fallout of Civil War before Infinity War.
In Civil War, Scott Lang joined Captain America’s team, and was put in The Raft for it. Though he was busted out, his fugitive status will be seen in the upcoming film. Director Peyton Reed talked about it at the Saturn Awards:
“Well he’s a fugitive in most of the first Ant-Man movie. He’s just a bigger fugitive now. I think that’s one of the fun things and challenges about the Marvel movies for us, for the directors and for the writers, is you do have to sort of consider what happened in the previous movies in terms of your jumping-off point for those characters. It’s something we talked a lot about early on and we definitely have stuff figured out, so there will be some big leaps forward.”
He went on to emphasize though that this will just as much Hope Van Dyne’s movie as it is Scott Lang’s.
“It’s something we’re excited about. For me as a comic nerd, I always thought of Ant-Man and Wasp as a team and that’s a lot of what the second movie is really about is how they work together, what their personal and professional relationships are like. To show her finally fully formed in this movie is really exciting. We really get to introduce this character into that universe. I mean we’ve introduced the character, but we haven’t seen her with her full power set and everything, so to me she’s not a supporting character in this movie. It’s every bit as much her movie as it is Scott Lang’s.”