The Flash Justice League teaser and poster are here! Warner Bros. has now released their Flash Justice League teaser and poster, featuring Ezra Miller as the Scarlet Speedster! Check them out below. RELATED: Aquaman Test Footage Shows Off the Underwater Hero Justice League stars Ben Affleck as Batman, Henry Cavill as Superman, Gal Gadot as Wonder Woman, Jason Momoa as Aquaman, Ezra Miller as The Flash, Ray Fisher as Cyborg, Willem Dafoe as Nuidis Vulko, Jesse Eisenberg as Lex Luthor, Jeremy Irons as Alfred Pennyworth, Diane Lane as Martha Kent, Connie Nielsen as Queen Hippolyta, with J.K.