Wired has an interview with Ridley Scott on his polishing of a new version of Blade Runner:
It's a classic tale of failure and redemption, the kind of story Hollywood loves to tell.
Fresh off his second successful movie, an up-and-coming director takes a chance on a dark tale of a 21st-century cop who hunts humanlike androids. But he runs over budget, and the financiers take control, forcing him to add a ham-fisted voice-over and an absurdly cheery ending. The public doesn't buy it. The director's masterpiece plays to near-empty theaters, ultimately retreating to the art-house circuit as a cult oddity.
That's where we left Ridley Scott's future-noir epic in 1982. But a funny thing happened over the next 25 years. Blade Runner's audience quietly multiplied. An accidental public showing of a rough-cut work print created surprise demand for a re-release, so in 1992 Scott issued his director's cut. He silenced the narration, axed the ending, and added a twist — a dream sequence suggesting that Rick Deckard, the film's protagonist, is an android, just like those he was hired to dispatch.