The SMS version of Sonic is quite a bit different from MD

The interesting thing you might not know, however, is that there are three other games which are all also called Sonic the Hedgehog, meaning that most likely, one of them is bound for the Wii. It could be a port of the 3D Xbox 360/PS3 game, it could be the Master System game, which is most likely we think, or it could even be the Game Gear game. So while we aren't adding this to our coming soon list just yet, you can speculate away!