When one of the screens changed down in the Cave, Bruce's attention was caught immediately. Seeing Clark there only focused his attention even more. He listened to the challenge, and remembering the most recent information received, he thought he understood Clark's logic.
He didn't wait until the challenge was finished, just hurried to change. By the time Mojo was asking for volunteers, he was wearing one of Tim's old Robin costume's and responded, "Batman; let's go."
Appearing next to the others, Batman-in-Robin's-clothing took a cursory glance around to see whom he was fighting with, at the same time taking in the surroundings. It seemed somehow post-Apocalyptic, but he couldn't say how or what had caused the trouble. It was far too quiet for his liking, but that made every noise that occurred around them all the louder.
He stared as the first creature appeared before them, taking her measure and deciding how to proceed. Despite being ambulatory, they didn't appear to actually be living. Clearly they were meant to look like people they knew, but that was obviously just...
Bruce looked up as the approaching mob caught his attention and Tony's order of retreat confused him. Tony charged, he didn't-
Dick. Tim. Alfred. Damian, Selina, Barbara, Dinah, Diana, Zatanna, Jim, Talia, it went on and on. Everywhere he looked was the face of someone he loved or cared for, desiccated and twisted by living death, rot, or other injury. Bruce stared in shock.
It couldn't be real, but they couldn't stand here trying to figure it out. Tony was right, and Bruce nodded in agreement. "Kal," he said, knowing exactly what he'd be looking at and hoping he could focus. "I need aerial support."