More like three months.
Unpopular opinion: an Obi-Wan movie in-between III and IV would be more useless and unnecessary than a Han Solo movie. People want it mainly for more Ewan McGregor as Obi-Wan I guess.
NONE of these Star Wars Stories/prequels/movies squished between trilogies are good ideas so far. Like, you've got this endless universe to play with....why not create some fucking new characters and stories and explore new themes?
Instead it's just pandering to nostalgia so far. ANH prequel with Vader? Check. Young Han Solo? Check. Obi-Wan between trilogies? Seemingly just a matter of time until that box is checked too.