I know there have been some edits of The Lord of the Rings, which seek to alter Jackson’s trilogy into something more in line with Tolkien’s book(s). However, something just as interesting would be reconstruct the films’ original cuts, before the pick-ups took place and the storyline was altered. It’s known to us the extended cuts still omit much footage, of which we’ve seen fragments in trailers, featurettes and stills.
While the shooting scripts are nowhere to be found (only transcripts matching the finished films are available), it could be possible, thanks to the clues found in the audio commentaries and liner notes from the OST, to try and put the available scenes back into their original sequence. Explainatory cards and subtitles could fill in any unavailable footage.