Here's the current software lineup for Wii U:
Updated
April - Injustice: Gods Among US, free Rayman Legends challenge mode eShop release
May - Resident Evil: Revelations HD, Deus Ex: Director's Cut, Fast & Furious: Showdown, Sniper Elite V2
June - Lego Batman 2, Game & Wario
TBA Spring - Mutant Mudds Deluxe
TBA Summer - Wii U Party, Duck Tales Remastered, Dungeons & Dragons: Chronicles of Mystara, Spin the Bottle
August - Pikmin 3, Splinter Cell: Black List, Disney Infinity, Disney's Planes
TBA Fall - Rayman Legends, Wind Waker Remake, Watch Dogs
September - Shovel Knight
October - Assassin's Creed 4, Batman: Origins
Missing in action: Ghost Recon Online, The Wonderful 101, Wii Fit U, Yoshi's Epic Yarn, Bayonetta 2, Smash Bros 4, X, Fire Emblem X Shin Megami Tensei, Super Mario 3D, Mario Kart, and confirmed but unannounced 2013 titles (planned for late release according to Iwata)