The Roulette Wheel Keeps Spinning!
There has been an Official JP Tweet including hashtags that might give us a hint of what is coming next.
This appears to tease that [Darknights' Memior] might be coming next along with the Anniversary livestream. No idea what "Run out of sanity" is about, but I'm sure a lot of Global Doktahs are running out of sanity trying to guess what is next!
[Darknights Memior] info can be found on the event page here:
Information on how to watch the JP Anniversary Livestream can be found here (Yes, global players can watch):