The Wii MotionPlus accessory is probably the best thing that could happen to Red Steel, and, luckily, Ubisoft has figured out this staggeringly obvious fact. The company has announced that they'll be using the new motion-tracking device in Red Steel 2, which is still yet to be officially announced itself. Although now that the game's producer is giving interviews about it, we can be pretty sure it's coming.
Adding the new technology will no doubt add to the already lengthy development cycle of the sequel, and accordingly no release window is given for Red Steel 2. This is the first game other than Wii Sports Resort that has been revealed to use the MotionPlus peripheral, so it's at least ahead of the curve in aspects not related to actually being available in a store.