According to this tweet from Nintendo's official twitter, they'll be streaming a fresh Nintendo Direct tomorrow, April 1st, at 3pm PT. They specifically state that this isn't a prank; they'll be discussing upcoming releases for the Wii U and 3DS. This would be an opportune time for them to talk about the disappointing but understandable delay for the new Wii U Zelda title. Without Zelda, they need to fill the giant, gaping hole in their holiday lineup.
Check back tomorrow where we will have coverage of the latest Nintendo Direct.