Aquaman and the Lost Kingdom is officially the last entry in the DC Extended Universe, with the movie releasing almost two full years before the DC Universe reboot. The following Superman: Legacy will completely sever all ties to previous movies and TV shows, giving things a fresh start. For this reason in particular, Aquaman 2 needs to come out as soon as possible.
Source：https://www.cbr.com/aquaman-2-cannot-afford-delayed-release/
