If I recall the exact quote from Aonuma correctly, he never explicitly stated 2015 was 100% not gonna happen. He said that they thought of new ideas that they felt would be good to implement and that this could affect the ship date. I'm paraphrasing from memory here, but I definitely remember Aonuma's comments being fairly nebulous.
I'd love if it happened but I don't think it will. I don't know WHAT the holiday title is gonna be, probably Mario Maker and Splatoon pushing with the usuals bar a surprise Metroid reveal or something, but I don't think it'll be Zelda.
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