The official Toei Tokusatsu Fanclub has teased two Kamen Rider projects to be co-created with another Japanese streaming service called TELASA (which I believe is the new name for video pass). The projects will be released on both services.
A video was released featuring this Jester-like masked figure. People with more patience than me have examined it frame-by-frame, and in the last few seconds when the screen briefly turns green, there is some text that only appears for a frame or two, which displays the name "Tsukasa Kadoya." Those with good memories may know that is the character better known as Kamen Rider Decade.
No more information is due to be released until December 20th.