Ant-Man and the Wasp is reportedly about to undergo reshoots in Los Angeles to redo the opening of the movie.
Again, the reshoots are reportedly going to start soon in Los Angeles and are rumored to shoot the entire opening of the sequel.
The source goes on to say that the entire opening scene of Ant-Man and the Wasp will be reshoot while on location in Los Angeles, which is also where Captain Marvel is currently filming.
Since Captain Marvel is filming in the Los Angeles area, it would make sense for Ant-Man and the Wasp to take advantage of the Marvel crew being in the same area.