The Empire Strikes Back was written, first draft after Leigh Brackett died, by George Lucas. The foundation of that story was written by Lucas. Lawrence Kasdan and Kershner eventually beefed up the dialogue and other tweaks. But, that film doesn't work without Lucas doing that first draft after Brackett died. He gave her credit even when nothing from her original script remains.....

And the Jackson love is getting to be a bit too much. He gets the love eventhough he makes 3 self-indulgent films in a row (Two Towers, Return of the King, and Kong.) that no one takes him to task on.