I thought Carrie had already seen the footage for Star Wars 8. If they are negotiating it is for the last film or she has a bigger role in 8 and 9 that will hurt the story if she is seen to have been killed off.
Might just be because they want to put out a Princess Leia doll. I’ve seen some buzz that a doll may be made.
Well if they need her to show up in 9 that means she doesn’t die in 8 unless she returns as a ghost like Obiwan in Empire and Jedi. That’s it! The movie is ruined for me. :)