“James [Wan] definitely knows where he’s going with [Aquaman], and that movie takes place in a world where Justice League happened, and Man of Steel happened, and Wonder Woman obviously takes place before Man of Steel — except for the bookends we have.
We could do a movie that takes place after Justice League, we can do a movie that takes place after Batman v Superman… well not really.
You can’t do a movie in between Batman v Superman and Justice League, but we can do movies that take place after Justice League and we can do movies that precede Justice League.”
Roven confirmed Aquaman being set after Justice League in a recent interview with CinemaBlend.