User blog comment:Rassilon of Old/6 new Young Justice: Legacy characters revealed/@comment-24.10.14.168-20120430232215/@comment-4007440-20120501002656

I'm guessing the other pics are place gholders for the other looks (like Robin holding Nightwing's spot). This would be why they had to wait until Invasion premiered and why Zatanna and Beast Boy look like they're Invasion counterparts.