Question: When did the supervillain portrayed by John DiMaggio is Batman: Under the Red Hood first appear in the comic book "Batman"?
Sentence (from "Batman: Under the Red Hood"): The film stars Bruce Greenwood as Bruce Wayne/Batman, Jensen Ackles as the Red Hood/Jason Todd, John DiMaggio as the Joker, Neil Patrick Harris as Nightwing/Dick Grayson, Jason Isaacs as Ra's al Ghul, and Wade Williams as Black Mask.
Relevant evidence: Yes