They've already started. Pikmin 3 just came out, then The Wonderful 101 (by the makers of Bayonetta, Devil May Cry, Viewtiful Joe) in a few weeks, Windwaker HD, Mario 3D World and Donkey Kong. Even the Sonic game could be decent. And Rayman is somewhere in there too. Wii U is the rebirth of the SNES/Megadrive/N64 with all these platformers.
Then there's Mario Kart 8, Smash Bros., Bayonetta and X in the new year.
On the 3DS, there's still Pokemon X/Y, Zelda, a new Mario Party and a new Layton on top of Luigi/Fire Emblem/Animal Crossing that have come out this year.
Thank fuck I don't have either system yet because I'd have a backlog to add to the one started in the Gamecube/Xbox days. I wish I had time to play all the awlsome.