The Aquaman story is set after Justice League Although we’ve known Aquaman (December 21, 2018) opens in theaters quite a while after the first Justice League movie (November 17, 2017), what we haven’t known is when the Aquaman story is set. Talking with producer Charles Roven, CinemaBlend learned that the film will not be like the upcoming Wonder Woman, which is mostly set before the events of Man of Steel, Batman v Superman: Dawn of Justice and Justice League. “Aquaman will make reference [to Justice League].