User blog comment:LLight/WonderCon: Young Justice Season 2's Alien Invasion/@comment-209.221.49.37-20120318221902/@comment-1038387-20120319210029

Rannians generally aren't invaders. They're mostly gentle.

It's confirmed already they're heading to Rann next season. Plus, a shot of Adam Strange and Sardath in the trailer. Maybe they're the subject of an invasion, rather than an invader.