Although I'm not expecting anything, I have to agree with GT6mebe. There isn't confirmation of GT7 not showing and just because Kaz and crew are in Frankfurt doesn't mean they can't reveal "anything" from there. PD and Sony are definitely behind all their competition and NEED to start showing something GT related on the current gen.
As for my DOUBTS of anything being revealed, with two VGT's to reveal for a last gen game, it would be a bad idea to have the VGT's, and Hyundai's, Bugatti's, and PD's collaboration, thunder stolen by a GT7 reveal. Unless, they reveal them in GT7's game engine (which would still kind of suck).
*sigh* I hope PD hasn't become stubborn like Acura (when will they EVER get rid of that bird beak/Gundam/Optimus Prime grille they put on ALL their cars).