Blockbuster is the name of four supervillains and a criminal organization appearing in American comic books published by DC Comics. The first iteration was an adversary of Batman and Robin, while the second served as one of Nightwing's greatest enemies. The latest version first appeared in the pages of the series 52 wherein he is directed into battle against Lex Luthor's team of superheroes.

Nightwing is the name of several superheroes appearing in American comic books published by DC Comics. The most prominent is Dick Grayson, who takes the name when he leaves his role as Batman's partner and sidekick Robin in his adulthood.