Sam Liu Director Stuart Allan Damian Wayne , Robin Voice Taissa Farmiga Raven Voice Brandon Soo Hoo Garfield Logan , Beast Boy Voice Jake T. Austin Jaime Reyes , Blue Beetle Voice Kari Wahlgren Koriand'r , Starfire Voice Sean Maher Dick Grayson , Nightwing Voice Christina Ricci Terra Voice Miguel Ferrer Slade Wilson , Deathstroke Voice Gregg Henry Sebastian Blood , Brother Blood Voice Jason Spisak Wally West , Kid Flash Voice Masasa Moyo Karen Beecher , Bumblebee Voice Crispin Freeman Roy Harper , Speedy Voice James Tucker Producer Sam Register Executive Producer Ernie Altbacker Screenwriter J. M. DeMatteis Screenwriter Frederik Wiedmann Original Music