[culled]

I don't think that most canceled shows have many unproduced scripts (The Critic is one exception). Even if the writers know where the story was going a) getting an explanation that's just a few paragraphs isn't as satisfying as actually seeing the conclusion. b) some writers may not want to let people know what they had in store (Joss Whedon with Firefly for instance) and the ones that are willing to reveal what was planned are already doing that for their canceled shows.