Supergirl Confirmed for James Gunn's Superman Sequel 'Man of Tomorrow'

James Gunn's Superman sequel, titled "Man of Tomorrow," has officially added another DCU hero to its already crowded cast. Returning from the first film are Nathan Fillion (Guy Gardner), Edi Gathegi (Mr. Terrific), Isabela Merced (Hawkgirl), Milly Alcock (Supergirl), and David Corenswet as Superman. Aaron Pierre will also join as John Stewart, crossing over from the upcoming series "Lanterns."