Ant-Man and the Wasp will return, and so will Peyton Reed. The Hollywood Reporter says Reed has signed on to direct Ant-Man 3 (official title pending) for Marvel Studios. Reed directed the first two films in the franchise.
There is no official release date yet, but with 2021 all booked up, we can safely assume the film will drop in 2022. Marvel has untitled release dates secured for February and July of that year.
Ant-Man 3 should be able to snag one of those dates. The franchise has previously called July home, so that may be the case once again.
Paul Rudd is reportedly (and obviously) expected to return. Evangeline Lilly should also be back, which would likely mean the Wasp will share top billing again once the official title is revealed.
SOURCE: The Hollywood Reporter