Watch this Sonic 4: Episode 2 gameplay trailer. And be quick about it. The music is awesome and demands to be heard immediately. Oh yeah, and the footage ain't bad either: get a glimpse of rival and Ep 2 antagonist Metal Sonic and revel in the return of sidekick Tails (please, oh please, let him not be useless this time around).
Episode 2, which comes with an all new graphics and physics engines, is expected sometime in spring 2012 on Xbox 360, PlayStation 3, Android, Windows Mobile 7, and iOS devices.