Indiana Jones 5

Speaking to BBC Newsbeat, Harrison Ford has revealed that director Steven Spielberg and producer George Lucas have 'the germ of an idea' for a fifth Indiana Jones film.
Notwithstanding this, you may need to wait a while for the film to hit the screen.   
"The process works like this," Ford explained. "We come to some basic agreement and then George goes away for a long time and works on it."
"Then Steven and I get it in some form, some embryonic form."
"Then if we like it we start working with George on it and at some point down the line it's ready and we do it."
Given that Ford is now 67 years old it looks like we will be seeing an Indiana Jones well into his seventies by the time the next film comes around.