Of course I'll take more ... with Harrison Ford as the lead; Lucas even suggesting the torch (whip) could be passed is an insult to every fan, not to mention Harrison Ford. I'd rather see the series continue with a new Indy, a la James Bond, than see Mutt take over.
...I'd better clarify: I don't want the series to continue at all without Ford, but to see him put out to pasture would be, in my opinion, even worse.
Either way, I'm going to enjoy the Hell out of Indy 4; we can worry about Indy 5 in 19 years when La Beef is 40!