Alexander Joseph "Lex" Luthor, Jr.[1] is a megalomaniacal multi-billionaire businessman, as well as one of the smartest individuals, if not the smartest, in the world. He is the former CEO of LexCorp Industries. Lex Luthor also becomes the greatest arch nemesis of Superman, whose potential to cause the Knightmare and whose more or less very existence makes Lex feel extremely threatened, which makes the relentlessly ambitious supergenius go out of his way to expose the godlike alien superhero as a fraud, and to subsequently destroy him, by first pitting Superman against Batman in a duel to the death, which ultimately fails as neither Superman or Batman kill the other like Lex hoped by settling their differences, and then his monstrous creation Doomsday, which does manage to kill Superman after a vicious battle. Lex, however, is ultimately jailed as a supercriminal for his exposed numerous crimes of illegal natures, first in Belle Reve supermax, and then in Arkham Asylum for the Criminally Insane. Following the founding of the Justice League and defeat of Steppenwolf, Lex escaped captivity, acquired a private yacht, and met up with the assassin Deathstroke to discuss their tentative, forthcoming partnership, which involved Batman in some way.