Nintendo E3 shows that this is a transition year

[Asriel]

At this point 3DS has a better 2016 line up than Wii U (in the West).

3DS has Metroid Prime: Federation Force, Yokoi Watch (Europe), Fire Emblem: Fates, and Super Jam Bros/Mario & Luigi: Paper Jam, along with Bravely Second (right?), Happy Home Designer and Zelda: Triforce Heroes before Christmas.

Wii U heading up to Christmas (dates are European) has Yoshi's Woolly World (June), Splatoon updates until the major update in August, Devil's Third (August), Super Mario Maker (September), Animal Crossing: Amiibo Party ('holidays'), Star Fox Zero ('holidays'), Mario Tennis ('holidays'), and Xenoblade Chronicles X (December). Fatal Frame V is also coming to the West in 2015, I'm going to assume that's an October release.

2016, Wii U has Fire Emblem x Shin Megami Tensei. Project Treasure and Pokken Tournament are possible 2016 titles.

If you assume they're first half titles, along with Smash DLC (character poll is still ongoing), and one or two other announcements, Wii U and 3DS could actually be enjoying a decent transition to NX, assuming NX launches in 2016 with Zelda as a cross-platform title. Notably, Nintendo released a future releases image for 3DS/Wii U which suggests there are more 2016 titles to come. This could be another poorly presented E3 from Nintendo, where they've chosen not to talk about 2016 titles not because of a lack of them, but because they thought emphasising the next six months on Wii U was more important. Time will tell.