The Wii U's sales are abysmal, but really, with no post-Christmas marketing, lots of systems on shelves, and no new games since launch, what can we expect?
The system has no third party support at this time, and the only major releases that are not on other consoles are NSMBU (which can be seen similarly to NSMBW) and Nintendo Land. ZombiU is the only major third party release, and it has not been pushed well enough tbh. Also, no VC and only a handful of eShop releases really hamper the downloadable game angle with the product, too.
January looks bad, and February will be just as bad if not worse, no thanks to Aliens and Rayman Legends both missing the month. March will start to improve thanks to ACTUAL GAME RELEASES. I suspect Nintendo will go back to actually marketing the system at the end of March, whereas for now it is all 3DS, baby.
There is little Nintendo can do at this point, and I for one think they were expecting the backlash like this as far back as early January, thus the Nintendo Direct and the delay of their Q1 lineup. I think LEGO City was meant for December (it was in the main Wii U ad), was delayed into Jan, and then sales figures came. Nintendo chose to delay its Q1 lineup ahead to the next FY, eat the losses of the Wii U this FY, and use the 3DS and yen changes to buffer the loss into a gain, albeit a very small one if at all. The end result is that this FY for Wii U looks terribad, and Nintendo is prepping for next FY to be the big one.
Wii U is failing and will continue fail this quarter and for some months into Q2. If the Wii U fails next FY, then the system will be changed and not to Nintendo management's benefit. This upcoming FY, Nintendo is going to go big with releases for Wii U (G+W, Wii Fit U, Pikmin 3, W101, Bayonetta 2, 3D Mario, Mario Kart, Wind Waker HD, Yoshi, probably Wii Sports U, Retro's Game, X...) and 3DS (Animal Crossing, DKCR3D, M+L4, Mario Golf, Pokemon X+Y...). If they fail to sell with these games, I definitely see Iwata stepping down to a smaller spot for a new President, for better or worse for us gamers. Of course, if those games don't sell, Nintendo is screwed in more ways than you think. :/