Konami has shared some information about the Raiden Metal Gear Solid 4 skin for Metal Gear Rising Revengeance. In Japan, this extra skin can be obtained by participating in special events. In the US it will be available for download at the day the game is released.
“I am lightning, the rain transformed…” Take on the identity of Raiden from Metal Gear Solid 4: GUNS OF THE PATRIOTS with this DLC for Xbox 360 and PS3. The skin will be available for $1.99 on Feb. 19th, 2013.
It seems likely for Europe the same conditions will apply, unless Konami has other plans of course.