Harrison Ford is TOO OLD for action in Indy 5
What exactly are they expecting Ford to do in this movie? He'd have to be behind a desk at the university, or being the one to sit in the sidecar as someone younger does all the action. Is it likely to be Mutt? Doubtful, Shia LeBoeuf is out of it these days, and recasting would be confusing.
Face it, the son has become the father.
Henry Jones Jr has become Henry Jones Sr.
Forget the whole thing, just let the franchise sleep forever more. Disney are greedy bastards.