Fan Casting Doomsday in Superman: What I Believe

The result of several experiments carried out in a prehistoric Krypton, which imbued him with a deep hatred for all living beings, Doomsday is a true killing machine of pure instinct, being driven by his unstoppable hatred. Like Superman and Supergirl, he too left Krypton before its destruction, destroying planets before eventually reaching Earth, where he brutally battles the Man of Steel in order to vent his hatred of Kryptonians. Superman has no choice but to kill him, but not before his opponent lands one last blow.