The immortal Professor Ivo, creator of the android villain Amazo, and T. O. Morrow, creator of the android villain-turned-hero Red Tornado, decide to join forces and create a new android together that will destroy the newly reformed Justice League of America. Hearing the JLA is holding a new membership drive soon, the two scientists decide to create an agent who will infiltrate the team as a new member and then eventually destroy them with a lethal electromagnetic pulse (EMP) weapon designed to shut down brain activity. While Ivo gives their creation artificial skin, musculature and organs, giving it temperature, pulse, and other human characteristics, Morrow creates the artificial mind, programming a personality capable of learning and adapting, implanting false memories of a human life. The android, Tomorrow Woman, believes she is a human born with mutant abilities due to having a "four-lobed brain," a possibly preview of how humanity may evolve in thousands of years (a similar explanation was given to explain the mutant abilities of DC hero Captain Comet). To make their victory more enjoyable, Ivo and Morrow program Tomorrow Woman to act and think as a noble hero, only activating the EMP weapon after she feels she has firmly gained the trust of the entire team.