Lucasfilm is in the early stages of developing a standalone Star Wars movie that revolves around Obi-Wan Kenobi. The early talk is linking director Stephen Daldry with the project although it doesn't have a script yet.
After the Star Wars anthology movies Rogue One and the untitled Han Solo project, talk around which character Disney was going to choose for its next non-Skywalker Star Wars movie began. One logical name that kept being thrown out was Obi-Wan, whose origin story is far-ranging and has a lot of interesting material to cover. Disney seems to agree and is pushing forward the project.
According to The Hollywood Reporter, if the project does indeed go through, Daldry will oversee the development of the film along with penning the script with Lucasfilm. No word yet on whether an actor has been honed on to portray the role.
Sir Alec Guinness portrayed the Obi-Wan in the original Star Wars movie for which earned him a Best Supporting Actor Oscar nomination. Ewan McGregor's portrayal of young Obi-Wan was one of the best parts of an otherwise disappointing prequel trilogy. Whoever lands the role will have big shoes to fill, although McGregor is not necessarily out of the running.
Obi-Wan Kenobi is a Jedi master who mentored Anakin in the prequels and Luke Skywalker in the original movie. He also had a relationship with Qui-Gon Jinn and Yoda and was a leader during the Clone Wars. There's a ton of storylines the movie can explore that not only will expand on Obi-Wan, but also bring back some old Star Wars favorites.
The current dock of Star Wars movies has The Last Jedi out in 2017, the Han Solo film in 2018 and Star Wars Episode IX in 2019. That means that the earliest we would see this speculated Obi-Wan movie would be in 2020.