Tom quirked one eyebrow at Kitty's insistence that it was pretty accurate for Lawrence. Seemed kind of an odd thing to say if you weren't in the same situation Tom was. Could Kitty have been another of the dimensionally displaced? He already knew it wasn't just him. He'd talked to a few people, among them someone from apparently later in his world's timeline than he himself was, so it was entirely possible. It was one of the better theories to explain why Welcome to the Jungle had special significance to her, too.
Tom still didn't really know how to deal with all of this. The dimension stuff he could deal with. It was monumentally weird, but he knew that sort of thing happened to superheroes sometimes, so he was able to cope with that. Sure, he kind of wished he'd been sucked into a dimension full of supermodels that were allergic to clothes, or possibly a dimension where bacon was not only delicious but also healthy, but hey. He could deal with dimensional displacement. The apocalypse, on the other hand, was something he hadn't deal with. Some gaudily dressed supervillain with a doomsday weapon he could have dealt with fine, but this wasn't the same at all. This was the apocalypse. This was Revelations, and once again, lapsed though he was, the religious implications terrified him. How did you beat Lucifer? This wasn't some stupid Charlie Daniels song and it wasn't just Lucifer popping up for a few souls. This was the end of the line. How did you even fight that, let alone win?
So he'd just been ignoring it. The more immediate concern was not ending up starving to death on the street, and he wouldn't be able to focus on what he needed to do to avoid that if he was panicking about what was most likely going to be the end of all things. So he hadn't really dealt with that yet, he'd just shoved it into a little shadowed corner in his mind for later coping. Or panicking, he wasn't really sure which was more likely.
Then she said he looked identical to this Arthur guy. Now, Tom wasn't a career superhero yet. He'd just started, and in his opinion he wasn't all that good at it. He hated heights, so dramatic airdrops just weren't something he handled well, and the fighting itself, while he was pretty okay at it technically, wasn't something he took much real joy in. Maybe a little, but that was just because of all the repression he'd been doing earlier in life, he was sure of it. The point was that he wasn't a Bat, so figuring stuff out from subtle context clues wasn't usually a thing he usually did. This time, though, there was enough evidence that even Tom could figure it out. The significance of the song and her getting his little joke that he thought only dimensionally displaced people would get, topped with her talking about someone he looked identical to, pretty much cinched it for him. He darted his eyes around for a second to make sure there was no one overly close to them, lowered his voice a little, and then said, "You mean dimensional duplicates, right?"