Event Horizon - Original Cut found on VHS
When the sci-fi horror Event Horizon came into US cinemas in 1997, it passed a difficult process prior to that. Because of its depiction of violence that was partly quite graphic (especially in the famous hell sequence), the MPAA refused to give the uncensored version its "R" rating. After numerous cuts, the film received its desired rating.
In earlier times, it wasn't common to archive censored material and in the case of this film, the scenes were lost for years. As recently as the mid noughties, some of those scenes were allegedly found in a salt mine in Transsylvania. Even though director Paul W.S. Anderson wanted to fit them into a Special Edition, he quickly gave up on that plan when he noticed that the found scenes were of too mediocre quality. This is why they were included as deleted scenes on every home video release of Event Horizon.
On this year's Comic Con in San Diego, Anderson had a surprising detail in an interview: Lloyd Levin, who was the producer at the time, found the original cut of the movie on a VHS cassette.
It remains questionable whether this version will ever see the light of day in form of a DVD or Blu-ray release. The quality is surely not applicable to today's standards. Still, there's hope that we might see it one day since we now know that it still exists.