User blog comment:Rassilon of Old/Silhouetted characters on the Young Justice: Invasion poster revealed!/@comment-1038387-20120502141050

Looks like KF on the right, and Artemis's bow on the left. Though if it's her, she's gone Saturn Girl on her hair.

I'm not sure of coat guy is Static, but it's definitely not Miss Martian. Static was hinted at; this hood idea could be a reference to his old Milestone appearance. I hope they're going for the unitard and baseball cap.