Pre-order exclusives are annoying, but this one is pretty awesome. Check out the Grey Fox DLC for Konami & Platinum Games‘ Metal Gear Rising Revengeance. Grey Fox, also known by fans as Cyborg Ninja, is popular from his appearance in the original Metal Gear Solid on the original Playstation. You can also see the DLC for the MGS4 version of Raiden. These appear to be more than just skins or outfits as they actually seem to fight differently, with different weapons. If so, thats pretty cool.
The US version of Metal Gear Rising Revengeance is due out on February 19, 2013 for Playstation 3 and Xbox 360. You can get the Cyborg Ninja skin exclusively from Gamestop by pre-ordering.