Soundwave on 24 April 2013
The 3DS got to about 13.8 million this past fiscal year.
That's with New Super Mario Bros. 2, Luigi's Mansion 2, Fire Emblem, Kid Icarus Uprising, Mario Tennis, Animal Crossing in Japan being a *monster*, Kingdom Hearts, Resident Evil Revelations, DQVII in Japan, a new hardware revision, $169.99 for the base model, etc. etc.
I think 9 million for the Wii U is pretty damn optimistic. Even with Mario Kart U and Mario 3D, I think they would struggle to get there.
But Nintendo generally starts on the high end with estimates (most companies do) and then will revise down as the year goes on.
