I copied this from my post in the Alien prequel thread, but it's worthy of it's own discussion.
A Mad Max sequel? A follow-up to Thunderdome?
I think they should leave it alone.
Unless there is an extensive 12 minute sequence of barbarians whipping Mel Gibson. I could watch that. But at the 4 1/2 minute mark, they should give him a drink and ask him about his opinion of Jewish people.