Azzarello has often collaborated with illustrator Lee Bermejo, starting with Lex Luthor: Man of Steel limited series in 2005. They followed up their partnership on the graphic novel, Joker, and the limited series Before Watchmen: Rorschach. Most recently, they reteamed on the three-part series, Batman: Damned, which is set in a different continuity from the main DC Universe. In the story, the Joker is discovered dead in the water near the Gotham Gate Bridge, and Batman is the prime suspect. Batman enlists the help of John Constantine; together, they delve into the supernatural side of Gotham to find the killer.