Will feature a new interface, says the legendary video games creator.
2.04 million Wiis and 1.56 million DSs sold in the US during November.
Launch week sales across Xbox 360, PS3 and PC outpaced those of CoD4 by more than 2 to 1.
133,000 units sold on PS3 and 34,000 units snapped up by Xbox 360 owners.
Nintendo fears the interests of the veteran video game designer will reveal his next big idea.
We pretend to play musical instruments with Nintendo's next big casual gaming monster.