Ubisoft has confirmed that the game will require Nintendo's latest peripheral.
One of the very first details about Ubisoft's Red Steel sequel was that it supports Wii MotionPlus. This morning, Ubisoft has confirmed to Edge that the Wii MotionPlus is mandatory in order to play the game.
In the latest Nintendo Power issue, the game's creative director, Jason Vandenberghe, said in an interview, "I would love to say to you that it'll be compatible with just a regular controller, but the gameplay simply isn't there without MotionPlus. That core experience just isn't there without it."
In the same interview, Vandenberghe revealed that the company is taking a huge risk making this decision, since Ubisoft can't predict the penetration rate of the Wii MotionPlus and can only assume that it will be high.