Matt Ryan John Constantine (voice) Jerry O'Connell Clark Kent / Superman (voice) Taissa Farmiga Rachel Roth / Raven (voice) Jason O'Mara Bruce Wayne / Batman (voice) Rosario Dawson Diana Prince / Wonder Woman (voice) Stuart Allan Damian Wayne / Robin (voice) Rebecca Romijn Lois Lane (voice) Rainn Wilson Lex Luthor (voice) Tony Todd Darkseid (voice) Shemar Moore Victor Stone / Cyborg (voice) Christopher Gorham Barry Allen / The Flash (voice) Ray Chase Jason Blood / Etrigan (voice) Camilla Luddington Zatanna (voice) Hynden Walch Harley Quinn (voice) Liam McIntyre Captain Boomerang (voice) Roger Cross John Stewart / Green Lantern (voice) / Swamp Thing (voice) John DiMaggio King Shark / Trigon (voice) Sachie Alessio Lady Shiva (voice) Matt Lanter Arthur Curry / Aquaman (voice) Sean Astin Billy Batson / Shazam (voice) Nyambi Nyambi J'onn J'onzz / Martian Manhunter (voice) Jon Bernthal Trigon (voice)