Nintendo's fall Nintendo Direct is scheduled for September 12, 2019. English ADR is scheduled to be recorded this week.
I don't know all that will be included but I do know that the Direct will have a focus on Banjo-Kazooie's inclusion in Smash, as well as a re-release of Banjo-Kazooie and Banjo-Tooie on the eShop.
Other things that I know are likely to be shown is
>Content update for FE3H and Mario Maker 2
>Witcher 3 release date (October 25)
>Yo-kai Watch 1 for Nintendo Switch
>A Hat in Time (pre-purchase available)
>Plants Vs. Zombies: Battle for the Neighborhood will be formally announced
>New Animal Crossing: New Horizons Info
In addition to the above, Nintendo Switch Online will receive a lukewarm revamp to celebrate a year of service, tiered service begins (Standard and Super):
>SNES games will be added to the existing NSO app on Switch (rebranded as "Nintendo Classics")
>Messaging and Game Appointment scheduling available via the NSO app on smartphones.
>An overwhelming majority of titles can now be alternatively backed up to an SD Card or USB device.
>Beta test of system native voice chat: Will be limited to Super subscribers only, and will roll out to standard subscribers by the end of the year.
Super Subscriptions to NSO will cost $10 more than the current prices. If you're an existing subscriber, you will get the chance to upgrade your subscription for 50% off.