Seems like Sonic Team has a little surprise up its sleeve for the upcoming Nintendo show, Space World, in Japan. The developer will be showing off four games, three of which we know about (Phantasy Star Online for Gamecube and Sonic Advance and Puyo Puyo for Game Boy Advance). Which leaves one more unannounced title to speculate about. Interesting. Could the Gamecube be getting a Sonic game, perhaps?