Several Reeves family members (not members of my family) got involved in a lawsuit, which complicated the matter.
How long the attorneys will hold the estate under the control of an administrator is anybody's guess. Probably when all the revenue is depleted.
I know of no one who really cares about doing a project on Jim after all these years since his death. It takes lots of money to do what you are asking about.
Great country music is a Reeves family tradition.