Sega has issued a press release to the media announcing the release date of Nov 22nd (USA) for Sonic Generations on the 3DS system.
UPDATE: It has been confirmed for Nov 25th in Europe.
SEGA’s much loved mascot Sonic the Hedgehog™ makes his way onto Nintendo 3DS for the very first time as part of the celebrations for his 20th anniversary. Speeding through many levels designed exclusively for the Nintendo system, Sonic Generations™ allows fans to play as both Classic and Modern Sonic across a range of iconic and memorable levels – all re-imagined for a completely new experience. Sonic Generations for Nintendo 3DS launches on 22nd November in North America.