Nintendo announced that there will be a Direct held on October 25, 2017, focusing on the smartphone game based on the Animal Crossing series. The Direct will be around 15 minutes long, and will be streamed starting at 12pm JST.
In terms of USA time, this would be:
8pm PT, October 24, 2017 and
11pm ET, October 24, 2017.
Update: The live stream will also be available in English via a Direct for Europe/UK at 7:00am UK time.
The Direct will be streamed on Youtube and Niconico, and the page for the Direct can be found here.