They've already released DLCs for multiple Wii U and 3DS games so far. Mario Kart 8, Super Smash Bros for Wii U and 3DS, Fire Emblem: Awakening, and more.
Yeah. That's why I'd prefer the PC/Wii U combo for the 8th generation of game consoles. I get the best of both worlds in terms of 1st party and 3rd party games.