This Brainiac was actually scary, and posed a physical threat to Superman. But he was not to last, as DC’s reality-altering Crisis on Infinite Earths event erased the old Brainiac from continuity.

Superman would fight Brainiac many times over the years and ... Despite his best attempts to avoid it, Lex Luthor would eventually die of old age, but his personality was assimilated into a ...

Lex's memory was erased during the House of Brainiac arc, but now Superman's greatest enemy has returned with a twist, and he's ready for a fight to control Supercorp and Metropolis. Superman #25 ...