I think this is a really interesting idea from Adam Driver. However, I think Disney as of now have had a lot of in the works Star Wars projects. Along with the belief that Ben Solo couldn't be resurrected for a prequel, they simply may want to shift focus onto new projects, like their upcoming Mandolorian and Grogu movie, and the new Starfighter movie with Ryan Gosling, both set to come out in the next two years. As well, over recent years the mass public has slandered the new trilogy of Star Wars films, and Disney I don't believe is completely willing to resurrect this series or character, even for someone of Adam Drivers caliber and connection to the series. While It would be an incredibly interesting and cool movie, I think it'll forever me the Star Wars movie that never was.