When I saw them live last year they talked about Jay and Silent Bob get rebooted. It's chronological to the rest of the movies, the reboot in question is the Bluntman and Chronic reboot, where Jay's Chronic character is a chick, and Silent Bob's Bluntman is skinny. They are going to Hollywood to stop that f'in movie from gettin' made... again. Not sure if Cock-Knocker is back, but I'd love it if Mark was back and totally bagged on Jake Skywalker.
Ben Affleck is back, at least according to the script excerpt Kevin and Jason performed at the show. He's the one, like last time, who inform the guys about the reboot movie in the works.
I can't wait to see it. Big fan of Kevin Smith.