I recently interviewed Robert Meyer Burnett who worked on the DVD of Star Trek V The Final Frontier for Paramount. He revealed some interesting tidbits about how Paramount Legal forced him to cut parts of the audio commentary, and how he'd originally hoped to create a Director's Cut of the film with Shatner but was stymied by budget...
http://tng.trekcore.com/bluray/01092013_robmeyerburnett1.html
http://tng.trekcore.com/bluray/01092013_robmeyerburnett1.html