Soundwave on 07 May 2014
I don't think there will be another Nintendo console in the traditional sense. The idea that they could release an iterative upgrade on what the Wii U is for late 2015 (about 18 months away) is laughable, they can barely release current Wii U games as is, releasing an new platform with entirely new games that would probably have to be an upgrade on Wii U would be impossible for Nintendo.
What I think you will get in late 2015 is a new handheld that can play Wii U-esque engines and handle ports from the system perhaps. That handheld may be able to play games on the TV too (directly or perhaps via a hub).
