I'm going to slightly alter my predictions.
On the Wii U side, I think Intelligent Systems will be putting out a Paper Mario title early 2016, which moves Animal Crossing to a mid/summer 2016 release, which is a good time for that game. It will get a bit of coverage and hopefully will be a return-to-form.
Likewise, I also think Nintendo will drop a big in-house title for 3DS as well as a big localization for this holiday- something more recognizable and polished than last year's Fantasy Life. The in-house might be some Pokemon (I know Game Freak isn't in house, but yeah), and since they're running out of IP to release we might see a very obscure franchise like Metoid show up. But it will more than likely be something else.