Yeah, I haven't played the full versions of either of the two prior Wii Sonic games in question, but based on the E3 demo Sonic Colors has both "2.5D" and full 3D sections. The 3D sections tend to be with the camera behind Sonic, but not always--sometimes the camera assumes more of a side-scrolling camera (even though Sonic can run toward/away from the camera). There is no auto-scrolling forward, as I believe was the case with Sonic and the Secret Rings.