Zelda U.
If that gets delayed I'd get one of these three Mario Maker, Splatoon, or Xenoblade X (I could easily get a 100 hours out of any one of these). I'll need to see more of each of those games before I can decide.
Bets:
1. If the Wii U sells closer to 10 million LTD by 1/3/2015 I win. If it sells closer to 9.5 million LTD by 1/3/2015 OfficerRaichu15 wins (winner gets 2 weeks of avatar control)--Lost.