Will the Wii U have good games? Most likely, yeah. Pikmin 3, Scribblenauts Unlimited, and the other flagship franchises...
But will it have ENOUGH tiles? That's what I'm concerned about. I've been a Nintendo fan for years, but if it doesn't have enough games I'm interested in by the time Christmas rolls around next year (the most likely time I'll be getting it), it's gonna be hard justifying a purchase.