The latest Sonic Generations trailer is targeted at a specific kind of nostalgia: for the era in which you were running past killer whales in sunny skies -- when you were flying around at the speed of sound, and following your rainbow.

And, in keeping with the Dreamcast-era theme of the trailer, our old pal Shadow the Hedgehog makes a dramatic entrance at the end of the thing, with no hint of the cars or guns of his later solo outing. He's in the game as a "rival," so he won't be playable.