Asriel on 15 January 2015
I'm assuming late September 2015, because so far 2015 for Wii U looks like this in the West:
January: Captain Toad (EU)
February: Kirby (NA)
March: Mario Party 10
April: I'm going to guess: Smash DLC (Miiverse stage + Tournament mode + Mewtwo)
May: Splatoon/ Mario Kart 8 DLC
So from here on out, I'll guess:
June: Yoshi
July: Mario Maker
August: Devil's Third/Kirby for EU
September: Xenoblade Chronicles X
October: Star Fox
November: Zelda
December: Yet to be revealed title. I'm going to go out on a complete guess and say a cross-platform, free to play Pokemon Trading Card game that uses NFC Pokemon cards. Maybe Animal Crossing in Japan, too.
The bolded titles I expect will be the end of each month.
