How are they going to support this console for another year? Unless they unleash a Nintendo Direct with 10 new game announcements I can't see it.
Well, assuming Pikmin 4 is a Wii U game, and assuming they don't launch any new Wii U games after September because the NX will launch in November, here's how 2016 is shaping up (some of these are my own guesses):
January to March
StarFox Zero
Shin Megami Tensei X Fire Emblem
April to June
Pokkén Tournament
Mario & Sonic at the 2016 Rio Olympic Games
July to September
Pikmin 4
The Legend of Zelda Wii U
That's basically the same rate of retail releases they've maintained throughout the Wii U's lifespan:
2012 [4 games]
> November
New Super Mario Bros. U
Nintendo Land
Sing Party
Ninja Gaiden 3: Razor's Edge
2013 [9 games]
> March
Lego City Undercover
> June
Game & Wario
> August
Pikmin 3
New Super Luigi U
> September
The Wonderful 101
> October
Wii Party U
The Legend of Zelda: The Wind Waker HD
> November
Super Mario 3D World
Mario & Sonic at the Sochi 2014 Olympic Winter Games
2014 [8 games]
> January
Wii Fit U
> February
Donkey Kong Country: Tropical Freeze
> May
Mario Kart 8
> July
Wii Sports Club
> September
Hyrule Warriors
> October
Bayonetta 2
> November
Super Smash Bros. for Wii U
> December
Captain Toad: Treasurer Tracker
2015 [9 games]
> February
Kirby and the Rainbow Curse
> March
Mario Party 10
> May
Splatoon
> September
Mario Maker
> October
Yoshi's Wooly World
New Super Mario Bros. U and New Super Luigi U
> November
Mario Tennis: Ultra Smash
> December
Xenoblade Chronicles X
Devil's Third
Animal Crossing: Amiibo Festival