The spiky haired hedgehog has been tipped to be returning to our next-generation systems for a while now and it's looking even more likely as a game play video has been released onto youtube.
It is hard to imagine how you can improve the original Sonic the Hedgehog, but SEGA certainly did with this sequel that released originally way back in 1992. Although many people will tell you that either Sonic CD or Sonic and Knuckles were the definitive titles in the series, for me it was always Sonic the Hedgehog 2.