This is already under threat due to the Star Wars AI videos being released on Youtube, seemingly without constraint as of yet.
The videos are not Hollywood quality [0], however they circumvent rules Disney can't easily break like using the likeness of any actor at any age in any circumstance.
These fan made videos get lots of views. Even if they were all removed from YouTube, this will be a difficult thing to stop.
I believe a generally accepted "good" or even "great" unofficial, Star Wars film built without sets or actors using AI is inevitable. And that this will be true for any popular franchise.
The natural corollary to this arc is into games, where using AI to code most or all of a AAA-competitive title would be considered inevitable.
I suspect Disney and Sony have at least someone pointing at this outcome.
[0] I suppose idealized Hollywood quality. They are better than some films.
Obviously it's gotten harder over the years, but PS4 and PS5 jailbreaks do exist so that means there's a vector for dumping games that were only ever distributed digitally (at least ones released up to the point where the jailbreaks got patched, as the stores will refused to serve new content until you update your system).