Superman & Batman: Generations is the umbrella title of three Elseworlds comic book limited series published by DC Comics in the United States, written and illustrated by John Byrne. A major concept of the series is the avoidance of so-called comic book time; it places Superman, Batman, and the other members of the DC Universe in a single timeline, showing the characters aging and being replaced by their progeny.

Ultra-Humanite is a supervillain appearing in American comic books published by DC Comics. He first appeared as a recurring adversary of Superman, and was among the first villains faced by him. He was designed to be the polar opposite of Superman; while Superman is a hero with superhuman strength, Ultra-Humanite is a criminal mastermind who has a crippled body but a highly advanced intellect. The Ultra-Humanite served as Superman's nemesis until Alexei Luthor and his Silver Age counterpart Lex Luthor were introduced in the comics. The origins of the super-criminal known as the Ultra-Humanite are shrouded in mystery. Even he claims not to remember his true name or appearance and attributes his vast intellect and mental prowess to scientific experiments of an unknown nature.