Get Wonderful 101 for sure, one of my favorite games of
all time. Constantly creative, fun, crazy, innovative...if you have any affection for super sentai/tokusatsu and Japanese sci-fi, you'll absolutely love it. Tropical Freeze is also probably a must-buy...I think it's an amazing game but I don't personally love it because it's just too damn hard for me and I'm generally not into platformers these days. My gf 100%ed the game and she swears it's an all-time GOAT platformer, rivaling even Mario 3. I think a lot of folks share that opinion.
BOTW...yes, it's absolutely worth it on Wii U. I held off for a bit for the same reasons - what if it's just too underpowered and I get a shitty experience? A friend convinced me that it was completely great and worth it, so I decided to bite (to the total tune of 90 CAD, yeesh). Best gaming money I've spent in a long time. One of the best games I've ever played. It looks and plays great. Stunning in every way.
Very slight hiccups once in a
blue moon. Otherwise, I can't complain at all. Beautiful, charming, often jaw-dropping game.
Get it.
EDIT: Also, if you want to mess with some Virtual Console stuff. the Game Boy Advance games on Wii U run so well. I love using the gamepad as a giant GBA, it's just awesome. Got a bunch of GBA games on there like Advance Wars, Metroid, etc.
SECOND EDIT: Against all odds, there are still random Virtual Console games being released for Wii U. Apparently the Turbografx games Final Soldier and Soldier Blade just came out today?? Gives me hope of seeing Mischief Makers and Astro Boy: Omega Factor at some point in the future.