In the " Forever Evil " storyline, Luthor plays a major role in opposing the Crime Syndicate, an evil version of the Justice League from a parallel Earth. He founds the New 52 incarnation of the Injustice League, helping Batman to free their world from the Syndicate's control and saving Superman's life from a kryptonite attack by Syndicate member Atomica. Public opinion of Lex Luthor becomes favorable. After learning an entity destroyed the Crime Syndicate's Earth, Luthor wants to prepare for the possibility that his Earth could be threatened next. To aid him in this and continue his new role as a hero, he requests Justice League membership. The Justice League are not sure about his altruism but decides his membership would make it easier to monitor him. While a Leaguer, Luthor helps against several threats, wearing a high-tech warsuit created by reverse-engineering Kryptonian technology, and builds a new Watchtower for the team.