Nintendo HDS 2016 or 2017?

[Soundwave]

Iwata actually basically already confirmed Fusion (HDS) for 2016:

http://www.neogaf.com/forum/showthread.php?t=818167

"Also, the idea I mentioned about redefining the definition of video game platforms will also require approximately two years."

Satoru Iwata - May 2014

The "redefinition" of gaming that he's talking about is the Fusion idea that he brought up in a previous investors statement, about Nintendo looking into a new setup similar to the iPhone/iPad/iPod touch (different devices that run the same apps with similar hardware).

New 3DS doesn't mean jack all, it's just Nintendo's usual last gasp redesign, in fact it's timing hints heavily that a true new Nintendo successor is imminent, case in point:

DSi XL (last DS revision) launched in Japan in November 2009
3DS launched in Japan in February 2011

(approximately 14 months later).

New 3DS launched in Japan in November 2014
15-18 months later = spring 2016 ... convienantly right in line with Iwata's above statement.