Prometheus returns as a member of Lex Luthor's second Injustice Gang. During the confusion caused by the arrival of the weapon Mageddon, Prometheus is able to use a White Martian space vessel abandoned in the Ghost Zone to infiltrate the Watchtower and attack Oracle. Oracle escapes, with Prometheus's helmet being damaged in the process. The villain retrieves his original helmet (lost during the first battle with the JLA) and battles Batman once again. Prometheus is neutralized when Batman sabotages his helmet, overriding the information on the disc Prometheus uses to upload his combat skills and replacing the data with the physical skills and coordination of Professor Stephen Hawking. Batman prevents fellow member Huntress from killing Prometheus. Batman and Martian Manhunter take Prometheus into custody and arrange to reduce Prometheus's brain to a mentally disabled state in order to permanently end his threat, reasoning that his skills and training mean that no jail could hold him under conventional circumstances. Upon Martian Manhunter's death at Libra's hands, Prometheus's mind was restored and he tracked down Chad Graham, killing his would-be protégé and maiming/murdering members of the Blood Pack super-hero team.