While Brainiac has attacked Earth's heroes enough to be considered a Justice League villain, his history with Superman goes as far back as Krypton. One of the most intelligent beings in the universe, the nearly indestructible villain collects cities from the planets he destroys and then shrinks them to keep on his ship. Superman has had to stop Brainiac from doing the same to Metropolis again and again over the years. However, their rivalry became really personal when the Man of Steel learned that he had Kryptonian city Kandor within his possession, but when Superman rescued that, Brainiac teamed up with Lex Luthor and a number of other villains to ensure its destruction and the death of all of those who called it home. He succeeded too, and after the recent Convergence event, Brainiac remains an ever present threat to Superman.
