Clark looked up when he was addressed, though it wasn't by his own name - just like the multiverse some of the other Clarks had looked nothing like him, so maybe his own face belonged to others across the multiverse too. "Ah no," He said shaking his head at the question. But at least this young man seemed to have at least a little bit more of a clue about what was happening and in that moment information was exactly what Clark needed.
"Yeah, yeah I just showed up here maybe ten minutes ago?" He shrugged, falling back a little on that Kansas charm as he spoke. "I'm ah -" well he could just go with Superman and maintain that but that would get old fast - and if this was just a temporary stop would it hurt anything if he went with his own name for a while? Maybe. "I'm Kal." He decided, going with his true name, at least no one would be able to trace Superman to Clark Kent in any universe no matter the face he wore.
"You sound like you know what's going on here," He went on, "Did the anti-matter consume your world?" He wondered, it was all that made sense to him in that moment - they were all here because the anti-matter had eaten through every other earth and they were here now waiting to be taken back. This was all part of the Monitor's plan, it had to be.