The overture was present when I saw it back in '79. I missed it on all the 80’s video releases.
Not sure if I still have it, but the Anchor Bay VHS box set came with reproductions of the lobby cards and a printed interview with the director, in which the alternate ending is discussed.
http://www.ebay.com/itm/The-Black-Hole-VHS-Movie-Limited-Edition-/141802565196I definitely still have the early 80’s Laserdisc if you need the original Dolby stereo mix.
It would be nice to have that VHS Set for sure, would love hi rez scans of those images and possibly a capture of that VHS, and yes we would love to get the LD audio.
I to love the overture and have always remembered the movie with it, but some seem to not like it much for whatever reason, I am leaning towards just having it and get this done but maybe if possible we will make it an option from the menu.