That's right. I forgot it was actually the opposite. They had to buy him out of Alien 3 rather than try to keep him in it.Fox absolutely paid for Biehn's likeness (the image that comes up on his death report to The Company -- a promo photo from Aliens was used) ...Biehn has gone on record that he was paid more for his likeness appearing in Alien3 than he was to actually be in Aliens.

The first drafts were with Hicks and Newt and little Ripley, then they rewrote it a few times with the wooden ship and monks with Ripley, then I think there was another draft where even more weirdness went on and then finally they settled on the script with the monks turned to prisoners although with Weaver's involvement it consistently went with "no guns."