I found this via Google News:
http://www.reuters.com/article/2014/05/08/us-nintendo-emergingmarkets-idUSBREA4703U20140508
Apparently Nintendo plans to introduce a new, low cost console in 2015 or 2016 to developing nations where it will not have to compete wit the Xbox One or the Playstation 4.
This seems like an clear indicator to me that the Wii U isn't doing too well.