War is coming and the seas shall part to swallow the land. A long-lost king must rise to stop this threat and save both of his homes. DC Comics is bringing the sea-bearing hero to the big screen in his own film starring “Game of Thrones” Jason Mamoa as the titular character. In Aquaman, Arthur Curry, the heir to the underwater kingdom of Atlantis, must step forward to lead his people and to be a hero to the world just as his brother, Orm seeks to unite the seven kingdoms against the surface world. Co-stars include Amber Heard, Willem Dafoe, Patrick Wilson, Dolph Lundgren, Yahya Abdul-Mateen II, and Nicole Kidman. Aquaman swims into theaters December 21, 2018.