It would make great sense, given that the Han Solo spinoff and Rogue One are both set between 3 and 4.
Obi-Wan learns to commune with Qui-Gon Jinn, he would have tasks and missions much like Yoda did in TCW Season 6. He could talk to Owen and Beru lots and maybe even get into bar fights in Mos Eisley. Maybe we’d see Luke and Ben have brief conversations and a Han Solo cameo. At first I thought it’d be hard to piece together a film but IMO it should be about Obi-Wan’s final arc.