According to Japanese publication Nikkei, Nintendo is all set to press the big red button at the Wii U production facility, and stop the conveyor belts by the end of this year. Which, is pretty big news, and would put the Wii U lifetime sales well under those for the Nintendo GameCube. Of course, Nintendo has slyly denied these reports, but Nikkei has been right more than a few times when it comes to the strange happenings at Nintendo.
This doesn't mean that the Wii U will disappear from store shelves come 2017, all it means is that what's left will continue to sell, and that there will be enough stock to meet the diminishing demand for the console as time moves on. This adds weight to the rumour and speculation that Nintendo's next console the NX will debut this year in some form, and may actually be a portable/home-console hybrid.
But even so, as the Wii U was introduced in 2013, this certainly feels premature. And going by the sales of the console, expected.