As you know, a betting man wouldn't place money on Zelda U (mainline game, not Hyrule Warriors) coming be out in 2014. I think that's unacceptable. Most Zelda home console games have come out within a year of the system release (N64 was two years later, but look at that console's sales) and as you know, Twilight Princess was a launch title. Zelda is a flagship franchise that is key to any chance of a Wii U comeback. It appeals to a more hardcore audience than Mario games that the Wii U is missing, and even if it doesn't outsell Mario, the games have put up some impressive numbers. I also think that 2015 is just too late. 2014 will be the make or break year for the Wii U. By 2015, no one may care. Zelda in 2015 would lead to a sales spike no doubt, but a Zelda around this Christmas could lead to momentum (or continue momentum from Smash and Mario Kart) that could be huge. Then you could have Metroid and Animal Crossing in 2015 along with say, Mario Galaxy 3. So no shortage of big titles in 2015 either.
Thoughts?
