Okay, that's up there with being the most horrifying thing he's heard so far. Vulcan has been destroyed in her reality? Vulcan? But not this one. It's...confusing. In his experiences with the future, fixing a mistake in a timelines caused it to cease existing--or at least he had assumed that Earth's destruction no longer happened. Was she saying that in some reality, somewhere, that timelines was still running, Earth but a dusty graveyard?

"But--which one is my future? This one or yours? Or are both of them still the future?"