Dude, I want to play Monster Hunter with you! Would you be down?
The answer to your question OP is that hopefully people will be playing more than just Smash to make the system worth it.
Going back in to my past playing 2nd quest WWHD, playing NSMB & SM3DW with my wife daily little by little, or Monster Hunter awesome-ness...I've already got my money's worth 2x over.
I almost pity those who only are planning to get it for Smash, there is plenty worth playing currently.
I don't have my Wii U hooked up, currently, but I could get it set up some day soon. Right now, I don't have a TV of my own except for a massive old set that I inherited from my great grandmother. It still works like a charm, and is a real testament to quality manufacturing, but it also weighs something like 80+ lbs. and is big and bulky... and it's not HD. It's at my parent's house, currently. I don't really have the money to go out and get a new TV right now.
But, there is always the awkward possibility that I could go hang out at my parent's house and play MonHun with you! My cousin, who stays with my parents, just went out of town for 2 weeks, so maybe I could hook up to his HD TV. I loved 3U. I mostly use bows & arrows, but I'm decent with hammers, lances, and greatswords.
PM me sometime and I'll see about setting up a "MonHun date" with you, lol.