The new Zelda title is mostly done, but it seems that they will take way longer than expected to finish the localization. According to the sources they cannot finish it before Dezember. Nintendo takes game testing very seriously and they will take for a huge title like that up to 6 months for testing, which means the game will most likely released in Sommer 2017 and not at the Launch of the Nintendo Switch. Some stores have a launch date for it, but the official site from Nintendo still shows 2017 without a specific month.
Source #1: Eurogamer
Source #2: Arcadegirl64