2015 Wii U retail release dates.

[SJReiter]

Kirby and the Rainbow Curse was delayed to February 20. So the list for NA is:
Hyrule Warriors Majora'a Mask DLC: February 5
Kirby: February 20
Mario vs Donkey Kong: March 5
Mario Party 10: March 20
Splatoon: May
Mario Kart 8 DLC Pack 2: May