Dennis O'neil

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. For Batman, the team is credited with returning the character to his dark pulp fiction roots, in contrast to the campy Batman television series of the 1960s.

However, comics historian Les Daniels considers O'Neil's "vengeful obsessive-compulsive" Batman to be an original interpretation that has influenced all subsequent portrayals of the character. It was during this run that O'Neil co-created the Batman villains Ra's al Ghul and Talia al Ghul. During their Green Lantern/Green Arrow run, O'Neil and Adams introduced a mature, realistic tone through stories such as "Snowbirds Don't Fly", in which Green Arrow's ward Roy Harper is revealed to have become addicted to drugs.

They also created and introduced the Green Lantern character John Stewart in 1971. As an editor, he is principally known for editing the various Batman titles beginning in 1986 after returning to DC. In 1989, O'Neil launched the Batman: Legends of the Dark Knight series, and was the writer for the "Shaman" and "Venom" stories. O'Neil led the Batman creative teams for the Batman: Knightfall (1993–1994) story arc.

O'Neil co-created the antihero Azrael (Jean-Paul Valley) in 1992, who temporarily became the new Batman during Knightfall.