When do you think Nintendo will show of Zelda U in full? And do you think it will sell any consoles?

I think E3 2016,and release btw only on Wii U,it will sell a few consoles at xmas time

E3 2016, release Q4, and will definately move a fair few consoles. i mean thousands not millions

We'll see it at E3 2016 and have a release probably in November 2016. November seems to be the standard month for Zelda releases.

The same day they fully reveal NX.

I'd like a Summer launch on both Wii U and NX simultaneously. Shockwaves would ensue.

E3 2016. And I'll even predict how they do it.
First, they will officially announce NX.
It's name, what the system is. It's features, concept, it's capabilities. How it makes use of My Nintendo. How it will be the ultimate Nintendo machine and how it will help bring gaming into a new era. When it releases and its official price.
Then they'll begin announcing launch titles and games scheduled for the launch window. The first game they will show off is Zelda Wii U.

So E3 2016?

If its a launch title, which I kinda hope (nintendo consoles do better, if they launch with a zelda+mario game) then I kinda hope the NX version runs at higher resolutions or something to make it stand out compaired to the wii u part.

Let ZeldaU have an exclusive Direct, to show everything it needs to be seen, and release it before Christmas.

I think they will have a Direct in February where they will reveal more info on Twilight Princess HD and Hyrule Warriors Legends. In that Direct, I predict they will also reveal more about Zelda Wii U. Not much, but more than what they showed in the November Direct (30 sec teaser+name?). Then they will reveal it in full at E3.

E3 2016, and it will move the most amount of Wii U's any game has, even draw in a fair amount of people who were on the fence. Probably release holiday, as well as a price cut to $200 around black friday 2016, with $250 for a Zelda Wii U collectors edition bundle and the game.