Sonic the Hedgehog has had a splendid 2011. There, we said it. But he really has. Between Sonic & Sega All Stars Racing for mobile platforms, the awesome Sonic Generations and the surprising return of Sonic CD in downloadable format, Sega really brought him back to, ahem, speed. And he's not slowing down in 2012, as the company has announced the follow-up to his original Sonic the Hedgehog 4 adventure.