I liked KOTCS for what it was, but it wasn't anything near the original three for me either. That said, I'm in the boat that would like to see more Harrison Ford Indy movies. As for another actor, probably not. Like it was already mentioned, it is too bad they left such a gap in between Last Crusade and Crystal Skull. They could have put out at least a couple of other Indy movies when Ford was a bit younger, and hit some great time periods. Oh well, I hope we see a fifth (and maybe sixth), before Ford is in his 80s.