I'm personally wondering if they're going to keep it 2D, or finally make a bold excursion into 3D. the SF EX series was shite, but that was then...
Also, how the hell are they going to match the story arc from SF II? Street Fighter 3 was good and all with good characters and good move sets but... it didn't have that all-encompassing bad-ass bosses. I mean shit, the main boss from SF 3 was a Blue Man Group reject in a thong.