10 Best Times Superheroes Became Villains
6. The Justice Lords - Justice League
Before Injustice came along with its more brutal take on an evil Justice League, the DC Animated Universe did the same on its long running and critically acclaimed Justice League cartoon.
Appearing in the episode 'A Better World', the story followed an alternate world where Lex Luthor became President of the United States. He publicly executes the Flash, which leads Superman to murder Lex in the Oval Office, thus heralding the start of a new brutal League.
The rest of the team willingly abide and, as fashionable as they may look, they're still bad to the bone. It takes the main DCAU Justice League to take them down, but the interesting distinction between the Lords and Superman's regime is that all the League form a united front. There isn't any division; they're so blinded by dogma that they all decide to enact a new, more authoritarian approach to crimefighting.
(They did have great costumes though.)