J.M. DeMatteis is an American screenwriter, comic book writer, and musician. He is known for his runs on Justice League of America, Justice League International, and The Amazing Spider-Man. He's also written episodes of Ben 10: Ultimate Alien (starring Yuri Lowenthal) and Batman: The Brave and the Bold (starring Diedrich Bader), and the direct-to-video film Batman vs. Robin (featuring Grey DeLisle).
- Be Cool, Scooby-Doo!
- Scooby Apocalypse - writer