The good news is Yuji Naka has been quoted recently saying, "I am under a strict NDA, so I can´t really say much. But I have seen the Revolution and I think everyone will be very pleasantly surprised, when Nintendo reveal everything."
And, "I look forward to the 'new kind of fun' that's always unique to Nintendo. I expect we’ll see a lot of surprises, such as the unannounced controller as well. I think it’s great that we'll be able to play Famicom and other games via Internet download. I hope that some Sega games will be playable as well."
Sonic Team, in my opinion should focus all efforts on a single Sonic/Knuckles game, a single Knights game, and something original. Billy Hatcher was original and much more interesting than Shadow the Hedgehog.