Prizes for the Japanese Metal Gear Rising lottery include posters, masks and iPhone cases
The official Japenese Metal Gear Rising Revengeance site has been updated with merchandise, that can be won through a lottery by purchasing certain editions of the game at certain stores (for the exact rules go here). The prizes include iPhone cases, posters and even a Raiden mask.
Speaking of cases, Hideo Kojima also showed a new iPhone 5 case with a Raiden artwork and a blue background. This seems to be a different one from the case that can be won through the lottery though, going by the picture above.
Source: Hideo Kojima’s Twitter, Metal Gear Rising Official Japanese site