Imperiex is a supervillain appearing in comic books published by DC Comics. He was initially introduced as an adversary to the superhero Superman, before becoming a main antagonist for the crossover "Our Worlds at War".

Manchester Black is a fictional character in American comic books published by DC Comics, in particular those featuring Superman. He was created by Joe Kelly and Doug Mahnke in Action Comics #775. Introduced as an antihero, the character later becomes a supervillain.