According to the press release, Sonic will be able to use these alien's color energy to create new paths through each of the game's levels. For instance, yellow energy will let Sonic drill through the ground, whereas cyan turns Sonic into a laser (yes, Sonic shooting lasers at long last). The Wii version will be a combination of 2D and 3D gameplay, while the DS version will tackle the handheld's dual screen capabilities. The game is scheduled to ship by the end of 2010 according to Sega.
Check out the trailer screenshots at the bottom as well.