something i noticed at e3 was there were only kiddie/family friendly/for everyone games on the showfloor. it's a slight generalization- deus ex was up at the square enix booth and i think i saw a wii u up somewhere else, but most of the games on the system were the family friendly variety.
the other thing i noticed was that outside of only a few titles, these types of games were only on wii u. it's like the ps4/xbox one were the super serial machines while the wii u was the one for ages 5 and up (well, microsoft focused a lot on what kinect 2.0 was capable of, but they devoted a lot of space to their racing and killing simulators).
i was probably off on epic mickey. it did better than the ps360 games in 2012, but i don't know its current total. lego did over 100k in its first month, and it's not unreasonable that it would have continued to perform relatively well even after advertisements died off.
anyway the point i was trying to get at is that the environment for a console is fostered early on, and unless there's a huge shift in philosophy (like the 360 had with kinect), it's really difficult to change that. nintendo brought out party game and platformer, and what sells? party games (sonic racing, just dance) and platformers (lego, mickey, scribblenauts). oh, and what's been announced for the machine? more platformers, more party games.
not saying it's a bad thing. just saying it's a thing. and it makes more sense when you see something like a hat in time getting looks from wii u owners because that's the fanbase that's currently being cultivated. i don't see this changing any time during the system's lifetime either, not when the next year or so looks to be more of that from nintendo themselves. only bayonetta 2 stands out, but there are always exceptions to the rule.
i actually forgot all about lego, and i thought of mickey as the only other wii u game to do relatively well.