Nintendo is preparing for another one of their popular franchises (no it’s not Mario), and wanted to do another Nintendo Direct to focus on it. On October 25th the direct will happen, but the pre-recorded broadcast will stream on YouTube from 12 PM JST (October 24 at 8 PM PT / October 25 at 7 AM BST). This will be a very short direct, only lasting 15 minutes according to the Nintendo twitter
— 任天堂株式会社 (@Nintendo) October 23, 2017
Most likely this will be an Animal Crossing title for mobile devices. There is currently no word on any upcoming Animal Crossing titles for the 3DS and the Switch. I guess fans will have to wait a little bit longer for those.