If they can release in 2016, the question is why - why will it be that easy to port games to it. Is it essentially an upgraded Wii U?
I would get that- Nintendo needs a do-over on branding and needs to re-launch without a GamePad. But if the device plays Wii U games and supports the GamePad we already own optionally - then it could be a platform to continue Mario Kart 8 sales - surely they aren't happy with 5 million.
On the other hand, if this thing sells 20 million - that's great for Nintendo but lets not pretend that the Wii U and 3DS aren't dead- all attention goes to the NX at that point.
If it plays my Wii U titles, I'll jump on the bandwagon, if not - I'd be hard pressed to not switch to a PS4.