The JSA and JLA converge at the old Secret Society of Super Villains base in Slaughter Swamp, looking for the final Legionnaire, whom they believe to be Triplicate Girl, and are attacked by a rogue mechanism named Computo. As they battle, Superman realizes that he has been through a battle exactly like it before and realizes it to be the work of his old future friend Projectra, aka: Sensor Girl. Before anyone can do anything she is rescued by her fellow Legion members and they fly off into a lightning cloud.