Even though I don't own a Wii U yet I'd have to say Zombi U based on my playthroughs at a friends, always scares me and is still enjoyable even though I end up dying due to not manning up.
Once I grab one Bayo 2 and MH U will mostly be a fave.
Step right up come on in, feel the buzz in your veins, I'm like an chemical electrical right into your brain and I'm the one who killed the Radio, soon you'll all see
So pay up motherfuckers you belong to "V"