What DVD do you want to see as A "Special Edition" I would like to the the first 3 "Star Wars" movies before Lucas did those "Special Ediitons" for the 1997 re-releases.  I would also like to see a special edition of "American Beauty" with the deleted footage. I would love to see a special edition release of "Misery", "Ruthless People", and "A Star is BOrn" the 1954 and 1976 editions.  I would love too hear a comentary on the 1954 "A Star is Born".  

If Warner Brothers put together a box set (Like what they are doing with the Superman Movies) it would sell- at Halloween time.  This is what I would do
DISC 1
"The Exorcist" (with the documentary that as released on the 25th ann editon)
Disc 2
"The Exorcist- The version you never scene"
I would have audio comentarys with Linda Blair, & Ellen B.
I would also show re-edited scenes so it could air on TV.
Disc 3-
"The Exorcist II"- The original cut
"The Exorcist"- The re-edited Version.
I would also have comentarys from Louis Fletcher and Linda Bair.
I have a documentary about the controvery about the whole movie.

Disc 4
"Exorcist III" Theatrical Editon
"Exorcist III"-The original directors editon.
I would then have a documentary with the cast and how they felt about all the changes the movie had to go through (th re-shoots)

Disc 5- Exorcist-The Begining  (retain all of the dvd extras from its firest release)
Disc 6- The prequel to "the Exorcist" but let the director change things if he wants to. They could have a cat interview as well.
Disc 7- ALL the delted footage from all the movies (if available) All the screenplays as a dvd-rom extra.

Then I would include a CD of the Music.

If they can put together a great Box set it would sell.  These movies all of them have cult followings for Various reasons.

With the re-make of "The Omen" coming its only natural people will bring up "The Exorcist".