The only thing that Disney seems certain about regarding any future Indiana Jones films is they don't plan on subbing in another actor as Indy.
“There are a lot of rumours,” the franchise's producer Frank Marshall says. “We haven’t even sat down to talk about Indy yet… at some point we’ll sit down. But there’s a bunch of people who could probably take the baton. … We’re not doing the Bond thing where we’re going to call somebody else Indiana Jones … we have to figure this out.”
Sorry, Chris Pratt. Mr. Ford, please put down the blaster and grab the bullwhip.