Dude...................................there is just no fucking way that Zelda is NOT unveiled at E3. Nintendo already said openly LAST YEAR that they could have shown the game off, in some form, but chose not to. It's been in development for years, with a huge development team (being joined by the ALBW team also).
It might not COME OUT this year, though I still think there's a chance of that. BUT it will absolutely, 100% be shown off, at least a trailer video, at E3. There is literally no way it won't be. It's been in the cooker more than long enough, and Nintendo knows they need to get people excited about Wii U again, beyond the already existent hype for MK and SB. They need to give people reasons to be excited about the long-term future of the system, so showing off games like this, and perhaps whatever Monster Games, or Next Level, or Retro is working on, as well.