No one knows for sure. But in 2010 Sega said they are planning something BIG because it will be Sonic's 20th Anniversary game. Most fans are hoping that the game would be Sonic Adventure 3. But that's just the 20th Anniversary game. Sega also said that there will be 3 Sonic games coming out in 2011. One being the 20th Anniversary game, the other being Sonic 4 Episode II, and we believe that the 3rd will be another Mario and Sonic game, and I've heard that it will NOT be sports related.
Sonic Adventure 3 and it will be coming out to the playstation 3
yes sonic 4 comes out in 2011.
the next sonic game is sonic 4! that's a 2D game! i can't wait!
sonic Rider Zero Gravity noob
Sonic and the Black Knight
It is not known as of yet if there will be another game in the Sonic Riders series.
November, 22 2011
no there are not
There Sonic Generations
the full game is coming on october 2007 sonic test run full version is never coming
no but there is sonic smashing the enemies for ps3
My personal favorite sonic game is sonic advance 2, but there is a new game coming out called "Sonic Generations" were you can play 2D or 3D sonic game and play as modern sonic or classic sonic, if you want more info look on youtube ;)