ORIGINAL: Jeremiah 29:11
I think they will have to start over with a new face and much younger guy like when they replaced James Bond. That being said, Roger more was a better "The Saint" than he ever was a James bond.
Well, what I'm saying is that if they are only planning on doing one or two movies, Harrison Ford will due, but if they plan on having a lot more sequels then they would be better to switch over now.