The console cannot sustain the good sales that it had during the holiday with a single relevant title (NSMU).
If Nintendo is serious about increasing the Wii U sales to a relevant level they need to a few things:
1) New Super Mario U bundle.
2) U$ 50 price cut during the holiday season
3) Wii U Sports released before black friday
4) Wii U Fit released ASAP
5) Mario Kart U before black friday
EDIT - Small corrections in the first sentence.








