
Acting
Dennis Joseph O'Neil (May 3, 1939 – June 11, 2020) was an American comic book writer and editor, principally for Marvel Comics and DC Comics from the 1960s through the 1990s, and Group Editor for the Batman family of titles until his retirement.
His best-known works include Green Lantern/Green Arrow and Batman with Neal Adams. It was during this run that O'Neil co-created the Batman villains Ra's al Ghul and Talia al Ghul. His other notable work includes runs on The Shadow with Michael Kaluta and The Question with Denys Cowan. As an editor, he is principally known for editing the various Batm…

Joker: Put on a Happy Face
as Self

Knight Immortal
as Self

The Fire Rises: The Creation and Impact of The Dark Knight Trilogy
as Self

Masterpiece: Frank Miller's The Dark Knight Returns
as Himself

Superman vs. Batman: When Heroes Collide
as Self

Heart of Vengeance: Returning Batman to His Roots

Batman Year One: A Conversation with DC Comics

The Universe According to Green Lantern
as Self

Secret Origin: The Story of DC Comics
as Self

Robin: The Story of Dick Grayson
as Self