Ethan Spaulding Director James Arnold Taylor The Flash , Barry Allen Voice Kate Micucci Zatanna Voice Kevin Michael Richardson Doctor Fate Voice Troy Baker Batman , Bruce Wayne Voice Nolan North Superman , Clark Kent , Kal-El , Killer Croc , Waylon Jones Voice Grey DeLisle Wonder Woman , Diana Prince Voice Khary Payton Cyborg , Victor Stone Voice Dwight Schultz Reverse-Flash , Eobard Thawne Voice Eric Bauza The Atom , B'dg , Jimmy Olsen Voice Tom Kenny Plastic Man , Patrick 'Eel' O'Brian , The Penguin , Oswald Cobblepot Voice Phil LaMarr Firestorm , Jason Rusch Voice James Krieg Screenwriter Jeremy Adams Screenwriter Jason Cosler Executive Producer Robert Fewkes Executive Producer Benjamin Melniker Executive Producer Sam Register Executive Producer Michael E. Uslan Executive Producer Brandon Vietti Executive Producer Jill Wilfert Executive Producer Tim Kelly Original Music Cris Mertens Film Editing Lisa Schaffer Casting