SEGA has just posted on a teaser for a new Sonic game that can only be seen on Facebook. It seems to hint at a new game that has the modern and classic Sonics in one game. It is said that this game will be coming to both the PS3 and Xbox 360 later this year.
This maybe the new Sonic Generations game for which SEGA has recently reserved a domain name. This may also be what was once called Sonic Anniversary which was a game that contained remakes of old Sonic levels from the classic titles.