Could Jason Mamoa walk away from his major role as Aquaman? According to a new report, Jason Momoa plans on leaving the Aquaman saga after Aquaman and the Lost Kingdom. Apparently, the film and script is so subpar, it has given the actor a desire to separate from the franchise. Therefore, the franchise’s future is up for some serious debate. There are rumors that test screenings for the film are going terribly. Some viewers thought it was the worst DCU movie yet. Others walked out of the theater.