This is really interesting stuff. It’s weird to think that Darth Vader wasn’t supposed to be the father yet, when there’s so many cool clues in the first movie that work well with it.
Strange how Leigh Brackett gets partial scriptwriting credit if her draft seems this much unlike the final film. I know they wanted to do it to honor her after her passing, but it seems like Kasdan really polished it up so much that,like you said, it seems unrecognizable.
Now, some of the wampa stuff was filmed; did that survive Kasdan’s rewrite?