Nintendo has a problem on its hands.
The Wii U, in its second full month of availability, sold a paltry 57,000 units in the U.S. according to data from The NPD Group. That’s substantially fewer than its predecessor and well under half the number analysts were expecting for the month. And it props opens the door — and perhaps issues a warning — for Sony and Microsoft, which are both expected to roll out new consoles this year.