User blog comment:Rassilon of Old/Silhouetted characters on the Young Justice: Invasion poster revealed!/@comment-4591819-20120503203933/@comment-184.34.88.51-20120504211119

the light from the blast or whatever in the background is reflecting off his right arm....im guessing thats cuz ITS ROBOTIC AND AWESOME!!! but brandon said that not every character on the poster will be in the show(but then again they also said young justice would pick up where it left off so he might have left off a few details)