Lex Luthor was the leader of the Justice League on the Earth universe inhabited by the Crime Syndicate. However, the decimation of his team by the Crime Syndicate left him and the last known surviving member of the Justice League, the Jester, to break into a Crime Syndicate stronghold to steal the quantum trigger, a device that the Crime Syndicate intended to use with their quantum-powered nuclear missile to destroy all known life on Earth. Lex Luthor used a transdimensional device to transport himself to the universe inhabited by Superman's Justice League to get his team's attention and help in defeating the Crime Syndicate. Luthor hid the quantum trigger on board the Justice League Watchtower satellite in the hopes that the Crime Syndicate would never find it. However, Superwoman used a