You probably know by now Lionsgate, DUNE’s international rights holder, has sanctioned the release of the SpiceDiver edit of the film for issue with the 7-disc box set now available only in Germany by Koch Films. In response, we may see even more “definitive” fan edits of the film pop up at any moment.
I doubt that it would be at all possible as a fan edit because to make a definitive version you would need to have in hand all of the unreleased footage and audio. It is with Both the Studio and David Lynch only a definitive version could be made.
What do you know of the version that has not been released? You are quoted on Duneinfo of knowing about certain scenes that were filmed not in the script regarding Nefud and the Lobotomy scene. Were you close to the production?
I have tried to make sense of the structure or intended structure and what goes where and MAF15 Deluxe version does a better job than Spicediver in terms of restoring rather than so much fan editing. But yeah both are good.
I suppose no definitive version exists yet. Will Lynch and the Studio do the proper Directors cut thing?