wiggydiggy
Guru
I have read that Paramount never really had faith in the film and it's about half an hour shorter than it should be and the studio lost all the other footage. Shame really, as I think it's an absolute class as it is, but I'd love to see it as Anderson envisaged it.
It wasn't lost as such but it wasn't stored properly - it was stored in a Transylvanian salt mine (really!) and had deteriorated. There does exist a video copy of the original cut of the film that the Paramount execs watched, and was immediately squeaky bum times for them and they ordered sweeping cuts.
Bit more info here: https://www.denofgeek.com/movies/exploring-the-deleted-footage-from-event-horizon/
And a Q&A Paul Anderson did here:
View: https://www.youtube.com/watch?v=TXL_CM4DXZ8
I'm quite lucky as a friend of mine in the 90s was a major film geek so they would put us onto the best films, EH was one of the best they found.