This is really mostly for the North Americans, as other launches may have other games. Although Europe is probably somewhat similar, no? I tried to include what I think people might vote for, although I suspect that New Super Mario Bros. U is going to be a blowout here.
Kinda sad that the games I want most are merely "launch window" and near as I can tell few people believe that they'll actually make launch window (Pikmin 3 and Wonderful 101). Guess I'll be playing Nintendo Land and some digital download games for 6 months or so!
If Pikmin 3 were launch, that would have been my vote. Instead I said Nintendoland just because it's a game I could see my wife playing and it's also a great showcase for the WiiU controller.
Zombi U is the most different (NL deserves props too) and most visually impressive. It'll probably be pretty decent at least. I vote for Zombi U. It's what I'll play first I'm quite sure.
I plumped for NSMBU. I skipped the 3DS version, so I'm fresh and ready for the Wii U version. It also looks beautiful, and has some genuinely innovative features too.
ZombiU. The more I see of this game (especially this week), the more it seems to be a nicely realized and unique take on the genre. REALLY hoping they can keep this hype up until launch, would hate for it to crash and burn the week before from bad reviews or something
I voted New Super Mario Bros. U but Nintendo Land is the one that will probably feel the most fresh. To be honest I don't think that I will even buy any other retail games, money is a tad bit tight what with my unexpected (though kind of expected) $500 car repair bill and between those two games and whatever eShop games there are that I will want (probably a lot), I think I will be ok for a few months. And then Pikmin 3 and Wonderful 101 come out?