Miyamotoo on 18 December 2017
https://twitter.com/AllSourceGaming/status/942636669575905280?ref_src=twsrc%5Etfw&ref_url=https%3A%2F%2Fcdn.rawgit.com%2Fs9e%2Fs9e.github.io%2Fmaster%2Fiframe%2Ftwitter.min.html%23942636669575905280
Aonuma confirms that work on the next Zelda has already begun.