User blog comment:Rassilon of Old/Silhouetted characters on the Young Justice: Invasion poster revealed!/@comment-4584676-20120502221341

(From left to right)

So Cassie, Arsenal (since someone hinted at him being in season 2), Timmy, am I the only one who sees the horns peeking out a bit from under the hood? Could that be Kid Devil, Blue Beetle, and I think that's probably Bart since he's pretty small.