What? 2016 is the new 3DS/Wii U successor for sure. 2015 is possible but very unlikely due to the 3ds they just released.
And the 3DS they just released isn't a real hardware upgrade. It's like DSi and oh man there were just so many DSi-only games, right? There will be like 3 games per year and under 10 games total in its lifetime released for new 3DS only to take advantage of the upgraded bits.