Earth-Three’s future is ruled by the Legion of Ultra-Villains, but for the first time a hero might just challenge them! And it will take a voyage through time and to a parallel universe to transform Urthlo 5, the last descendant of Alexander Luthor, into the Defender! Guest starring the Faultless Five, the Crime Syndicate of America, and the Adult Legion of Super-Heroes!
When a few members of the Legion of Substitute Heroes commit a daring robbery, the Legion of Super-Heroes must face the possibility that the Subs have gone bad! However, it soon becomes evident that evil Legionnaires from the parallel universe of Earth-Three have invaded this universe, and they will stop at nothing to get what they want! Can the Legion defeat their ruthless counterparts, even with the help of the heroic counterparts of the Fatal Five? Introducing the Legion of Ultra-Villains and the Faultless Five!