Retail releases in Europe 2015 - Released or confirmed dates:
Captain Toad - January 2
Mario Party 10 - March 20
Kirby an the Rainbow Paintbrush - May 8
Teslagrad - May 8
Splatoon - May 25
Legend of Kay Anniversary - June 12
Lego Jurassic World - June 12
Yoshis Wooly World - June 26
Mighty No 9 - September 18
Rodea Sky Soldier - September 25
Lego Dimensions - September 29
Mario Maker - September XX
Upcoming, 2015 release possible/likely
Baila Latino
Devil's Third
Disney Infinity 3.0 - Starter Pack
Fatal Frame
Guitar Hero Live
Lego Marvel's Avengers
Mind Labyrinth
Project CARS
Project Giant Robot
Project Guard
Shin Megami Tensei X Fire Emblem
Star Fox
Yoga Master
Tantalus Wii U AAA port
Xenoblade Chronicles X
Nintendo E3 game
Nintendo E3 game
Nintendo E3 game
All in all.. it's an ok year.