After the teaser video that SEGA released not so long ago, we now have gameplay footage of the upcoming game Sonic Generations. A Sonic game which features both the green eyed modern Sonic and the stubby fat Classic Sonic.
From the looks of it, the game uses the same engine from Sonic Colors. A mix of both fast paced 2D and 3D gameplay which I think worked well in Sonic Colors. I'm sure some of you speculated that since the game has 2 Sonics in it, that it would be a co-op game. The trailer shows no signs of co-op gameplay and if you notice, Classic Sonic did not have a shot of 3D gameplay nor the ability to boost.
As to how both Sonic will interact in the game is still unknown. We just have to wait for further news from SEGA.