Dominic laid on the rafters. Using his wrist computer ti watch the teens arrive through the cameras. Batman greeted them, M'gann gave her son, or whatever a few guidelines. 

He heard a cough, and looked over to see two narrow white slits glaring at him. Without words the boy wonder knew what was expected of him. "Fine." He jumped off the rafters and glided down. He looked at his teamates with a trained eye under the domino mask. 

"Im Robin, but I'm sure you've heard of me."