While Peyton Reed was able to discuss the Quantum Realm, he obviously could not go into anything having to do with Avengers: Endgame.
Specifically, fans are going to see how Scott Lang escapes in Avengers: Endgame, and many are wondering how the Quantum Realm will factor into the highly anticipated movie.
Ant-Man and the Wasp director Peyton Reed discussed the Quantum Realm during a recent screening of the sequel.
I also know what time and space can do down there and the seeming sort of infinite quality of the Quantum Realm.