Cult of Ghostface has to be next. I don't know how I feel about Sam with the dark turn they keep hinting at. It would be different, but would it be Scream? I think they'll just keep playing with her brutally stabbing up folks, and enjoying it.
One of the best characters in the series is Gale. No matter what happens to her, once she's in pain or hurt, she just goes back to what she knows - exploitation. It's what ruined all of her relationships. They'll probably off her in VII now that Kirby is back...and pony up the money for one last Sydney ride to close out their chapter.