I'd say the World Title. They seem to be building up Joey's loss from recent show reports (Or maybe that's just a silly misinterpretation by me) and it looks like B-Boy may be the special choice here. I honestly don't think B-Boy would be an appropriate choice as a successor to Joey, so I hope it doesn't go down like that. Joey seems to have gone through pretty much everyone he can, and it's been a good run.
I just can't see anyone on the roster beating Dragon & Davey anytime soon. Obviously they're going to have a big blow off feud once they lose the titles, and I think they can get some more out of this reign. Plus, there really isn't any team who's really committed to PWG on the roster who would be believable in beating them. And I think a loss of their stature should be built up for a couple of shows to make it meaningful and easier to start a feud with.
Puma > TJ Perkins!