This may be useless, but Peter Mayhew’s tweeting of the original script (with emphasis on Han shooting first) to build up to a “big announcement” that he ultimately never made.
EDIT: Also, according to a poster on another forum in 2015, his company was instructed to remaster “Empire of Dreams” in HD.
Good point about Mayhew.
As for Empire of Dreams, could that hd remastering simply have been for purposes of putting it up on youtube? Or is that upload still in 480p like the dvd?