It is now official. Nintendo Co. Ltd (Nintendo Japan) has confirmed that a new system will be unveiled, and playable, at E3 in June, and that it will launch in 2012.
Iwata told Bloomberg News that since 3D TVs are not yet commonplace, it will not emphasize 3D like the 3DS.
Still no confirmation on controller or specific hardware rumors.
SRC = http://www.bloomberg.com/news/2011-04-25/nintendo-forecasts-net-to-climb-42-will-introduce-wii-successor-in-2012.html