Peter J. Tomasi is an American comic book editor and writer, best known for his work for DC Comics. As an editor, he oversaw numerous comic books featuring the Justice League, including series starring various members of that team such as Batman, Aquaman, Martian Manhunter, Green Lantern, and the Flash. As a writer, he has written titles featuring Batman-related characters, such as Batman and Robin and The Outsiders, and Green Lantern-related series such as Blackest Night, Brightest Day and Green Lantern: Emerald Warriors. He also wrote the screenplay for the animated movie The Death of Superman.

Batman and Robin is an American comic book ongoing series, created by Grant Morrison and featuring Batman and Robin. The debut of the series followed the events of "Batman R.I.P.", Final Crisis, and "Battle for the Cowl" in which the original Batman, Bruce Wayne, apparently died at the hands of DC Comics villain Darkseid and features the winner of the "Battle for the Cowl" as the new Batman. The conclusion of Battle for the Cowl shows Dick Grayson ascending to the role of Batman, while Damian Wayne becomes the new Robin.