Sam Liu Director Cameron Monaghan Superboy Voice Nathan Fillion Green Lantern , Hal Jordan Voice Rebecca Romijn Lois Lane Voice Rainn Wilson Lex Luthor Voice Jerry O'Connell Superman , Clark Kent , Cyborg Superman Voice Patrick Fabian Hank Hensaw Voice Cress Williams Steel , John Henry Irons Voice Rosario Dawson Wonder Woman Voice Charles Halford Bibbo Bibbowski Voice James Krieg Screenwriter Tim Sheridan Screenwriter Alan Burnett Producer Sam Register Executive Producer Frederik Wiedmann Music Wes Gleason Casting