As a pre-E3 surprise Sega announced a mascot racing game. Sonic & Sega All Stars Racing includes Sonic and other cutesy characters like AiAi from Super Monkey Ball and Amigo from Samba de Amigo. Each character has their own car and an all star super move (read: comeback move) like the Tails Tornado. Similar to Mario Kart power ups and items can be collected on the track too.
Sonic & Sega All Stars Racing has split-screen offline multiplayer for four players and an online mode for eight racers. The game is in development for the PlayStation 3, Xbox 360, Wii, and Nintendo DS. While not specifically pointed out the Nintendo DS version probably won’t have split-screen multiplayer. It should have a local wireless mode, but will the portable version have an online mode? too
Also, why is Sonic in a car? Shouldn’t the world’s fastest hedgehog burn the competition on foot?