- The Phantom Menace: I'd love to see the early version where they "went too far in a few places", before they went in and "fixed" it because wow.
- The Star Wars: I'd like to see the famed work-in-progress cut (even if it was only a couple of reels) before they restarted the editing from scratch.
- The Hobbit Trilogy: I'm sure the footage that was shot, could have been the equal of LotR if it had been assembled in a different way.
- Star Trek V: Shatner's ideal, uncut, full-length, blank-cheque, "yes ILM are available" version.
- Star Trek Nemisis: the 50-minute longer workprint, although in a somehow finished state. It'd still be awful but less so... maybe.
- Rogue One: before it was meddled with and almost certainly made worse, although the released version was fine.
- Thor: The Dark World: again before it was meddled with and almost certainly made worse. I can sort of picture what it was from the deleted scenes and I'd like to see that version.
- Godfather 3: IIRC the original opening scene was miles better. It's never going to be up with the first two but it could've been better.
- Heroes Shed No Tears: Just watched a mini-doc demonstrating the differences in John Woo's original workprint cut. Apparently it's available if you can find one particular old Thai VHS tape that somehow had it. I still LOVE the regular cut though.
- Heaven's Gate: In 2005, for some reason MGM decided to do their own completely new "radical" recut (without consulting the Director I believe) using deleted material, screened it a couple of times at festivals, then there was a change of management and nobody saw it again.
- The Thing (2011): the version with all the freaky practical FX before they replaced them all with terrible CGI.
- Once Upon a Time in America: the super extended 5-hour mega cut. Scorsese is still working on it, last I heard. Come on Marty we believe in you!
- A Star is Born (1954): The original theatrical release version has never been released on home video. Various patchy restored/extended versions using outtakes and still photos are all you can get.
- Kill Bill: the whole bloody affair. There are fan versions but I'd like to see the real deal.
- All Lucas films in the original version.
- (insert name of pretty much any Orson Welles film)
- (insert name of all the films the Weinsteins meddled with)