For a moment, Jack doesn't even understand the question. "Hunh. Oh. Well, local time is 3563, so, if you do exist in this timeline, unfortunately, you're probably not still around." He shrugs. "Sorry."

"But that brings up a way more interesting question." Jack pauses for a second, and looks at Steve seriously. "Let me guess, you just came from the Battle of New York?" Because if the answer is no, then things get interesting.