User blog comment:Rassilon of Old/New Young Justice in March/@comment-4105479-20120128152107/@comment-1038387-20120128154613

It's been done before in JLA: World without Grown-Ups by a one-shot villain named Bedlam long before JLU. And Klarion (sorry, Klarion bum bum BUM the Witch Boy) also messed with the teens in a "get rid of the adults" kind of way in Sins of Youth; Young Justice played a large role in both.