A stand alone Obi-Wan Kenobi movie has been rumored for years now. Fans have been clamoring for it and, according to a rumor on FanthaTracks, the movie may be on the way.
FanthaTracks has a source that has given information about early pre-production on the film.
The project is sufficiently along that an art department is now in full pre-production mode at Pinewood Studios, England with ancillary work being carried out at Industrial Light & Magic in London. A number of concept artists, prop modellers, and storyboard artists are working as a team across the two locations on the film, with the group growing in numbers every month.
Contracts have also been extended to a number of crew who have worked on various Star Wars films produced at Pinewood under the Disney era, to join the production when their work on Episode IX ends. This will see the Obi-Wan crew grow gradually over the remainder of the year but primarily from October on wards.
Pre-production will continue at Pinewood whilst Episode IX shoots from this summer through the end of the year, at which point production of the Obi-Wan movie has been scheduled to move onto stages in mid January 2019 with the main shoot to begin in April of 2019.
The project is being developed under the corporate name of PLT Productions (UK) Ltd.
The scheduled release date is December 2020.
As stated above, this story is a rumor and has not been confirmed or announced by Disney or Lucasfilm. There is no mention of casting or the potential return of Ewan McGregor in the documents. Hopefully we will get an official announcement from Lucasfilm sometime in the near future.