There was room for him, in Nebula's time. His own universe, in the future. Tony couldn't possibly read into that in any other way than what it was meant to be. He didn't want to think on it, not yet. This simply wasn't the time or the place for thoughts of that magnitude. But he did, for only a second, let surprise and grief wash over him. Less for himself than for that little girl he'd never gotten to meet but he'd so clearly loved and did love.
He could have that. If he wanted. There was space.
Tony took a step forward before pausing again. "I can't," he said, and sounded so uncertain that it very well might have been a question.