Counting the most recent DVD re-release, the theatrical trailer was left off it, as well as the production notes subtitles and the "video commentary" that had been on the previous DVD. So maybe those could be included as well (although maybe not the subtitles and vid. commentary, since the whole flick would then have to be included). And I know there are deleted scenes from Ghostbusters II, but unless someone happens to have them on a video or something, they've never seen the light of day on any release.
For reference, from Ghostbusters Laserdisc page (I tacked on the rest of the mentioned extras below it). Also, this site has some multimedia stuff for both flicks elsewhere on it (and for sale a DVD with GBII EPK and other clips), and the Ghostbusters music video (regular version, and VH1 "pop-up video" version) for download. So depending on how crazy you wanna go with it, there's a bunch o' stuff that could be included.
LASERDISC EXCLUSIVES
Materials NOT found on the DVD or in the "Making Ghostbusters" book.
Deleted Footage: The Stairway
As Ray, Egon, and Peter walk down the stairs and enter the Paranormal Studies Laboratory, they discuss who should win the Nobel Prize.
*note: I saw one other scene mentioned a couple times on other sites involving Ray and a ghost getting frisky with him while he's lying down (?)
Two Split-Screen Before & After Special Effects Comparisons:
1. Library Ghost -- The scene where Ray says "Get Her" and the ghost in the library turns gruesome.
2. Ballroom -- The scene where the Ghostbusters trap Slimer in the ballroom of the Sedgewick Hotel.
The Theatrical Teaser
A promotional teaser shown in theaters before the film itself was complete and before the final music had been recorded. It contains footage not used in the finished film (such as the original theme song).
The Original Theatrical Trailer
Even though this IS on the DVD, the one on the DVD is NOT in Letterbox and is missing the "Coming Soon to a Theatre Near You" screen at the end.
Ruth Oliver's Library Ghost Scream Test
The actress who portrayed the library ghost practicing how she will be screaming the word "Quiet" for when she transforms into the hideous ghost.
Hundreds Of Still Photos/Drawings/Storyboards:
It should be noted that all of the laserdisc's still frames (photos, drawings, etc.) are full-screen and of higher resolution than the DVD's still frames (which are shown on a very small portion of the screen).
* Several "Special Effects" Photos/Drawings -- such as the effects crew group shot, the Real Ghostbusters "Slimer" pics (such as this one), one or two of the building of the Shandor Building pics, probably more.
* Several "Stay Puft Marshmallow Man" Photos/Drawings -- such as a few of the Stay Puft drawings, and a few of the production photos, maybe more.
* Several storyboard sequences -- such as a storyboard shot of the library ghost, a couple shots after the "Dogs Drag Dana" sequence (objects in her kitchen fly across the room and stick to her icebox)
* A few frames of textual trivia -- some facts not really found elsewhere)
DVD Features and Other Extras:
- Full Screen Theatrical trailer on 1st DVD release
- Ghostbusters II Theatrical trailer on 1st DVD release
- The trivia subtitle track from 1st DVD release (?)
- Video Commentary from 1st DVD release (?)
- Ghostbusters- Ray Parker, Jr. video