Nintendo has revealed that Zelda U has been delayed to 2017, as well as revealing that the game will be a dual release with the Wii U and NX. It was previously suggested that Nintendo would be making a huge presence for Zelda U at E3 and indeed Nintendo has highlighted their plans as such. According to Nintendo of Europe the Wii U version of Zelda U will be the only playable Nintendo game at the event reportedly to provide a true sense of immersion with the game.
Nintendo of Europe sent the following message in a press release:
E3: Nintendo changes its approach to the show every year. This June, Nintendo will focus its attentions on the upcoming game in The Legend of Zelda series. The Wii U version of the game will be playable for the first time on the E3 show floor, and it will be the only playable game Nintendo presents at the show, in order to provide attendees a complete immersion. Additional information about Nintendo's E3 plans will be announced in the future.
It is hard to decipher the true nature of this reveal and it becomes questionable whether Nintendo knows what they are doing this year. It could be suggested that Nintendo is planning another event for the rest of their games, but it really comes down to personal opinion on this news.
If they really want to do Zelda U justice they need to provide a demo on the Wii U eShop to allow the rest of us to give the game a try at least as compensation.