A Brazilian Sonic Fan Site has uncovered a possible release date for Sonic 4: Episode 1. Granted that they claim to know only the Playstation release date but would it be safe to assume a simultaneous release for all platforms?
They have stated that the game is due for release in November of 2010, no specific date but in all fairness, November sounds like a pretty predictable date. We will let you know more as we do.
As with any type of rumour such as this, it is not final and has yet to be confirmed by Sega, as soon as it is then we will fill you in.
Source - translate.google.com/translate...
Scan - i2.photobucket.com/albums/y3/s...