Pain
Khan didn't know how long had passed since the beginning of the battle, and keeping track of the flow of time was simply impossible. Wayne was a formidable opponent that didn't allow distractions. A single mistake would result in broken bones or worse.
Still, one thing was clear. Khan had to hurry if he hoped to do anything about the bomb and his companions. It was probably too late for the weapon already, but he would be fine with the terrorist attack as long as he saved his friends.
Khan and Wayne stared at each other for a few seconds. Wayne merely smiled while Khan did his best to gain as much information as possible in that short time.
Wayne's element was a mystery. Khan had his hypotheses, but they were useless in that situation. He simply didn't have time to find and exploit specific weaknesses.