[ the confidence may or may not be deserved; Johnny doesn't have proof. He just has some scraps of evidence and ideas, and a very strong desire for it to be the truth, and in this case, that's enough. He nods. ]

Have you noticed that there's people from all across time and space around here? That's 'cause it's all distorted. The "past," "present" and "future" are all running together. So when they say your world's gone, what they really mean is "it will be gone, at some point." It could be a million years away.

[ vaguely, he gestures over one shoulder, back in the direction of the meeting place. ]

They gave me something that lets me look into a moment in time on my world right after I left... they can probably get one for you, too. Got to see everything in one piece.