Indiana Jones is a still a huge franchise for Lucasfilm and certainly, Disney was buying it as much as it was buying Star Wars when it purchased George Lucas’ company.
Harrison Ford is currently 75 years old and he’ll be 76 when production begins next spring on the fifth Indiana Jones movie.
Steven Spielberg understands this as he tells The Sun that the franchise “will certainly continue” following the next movie.
It seems unlikely that he’ll be looking to do many more of these films, but it seems equally unlikely that there won’t be more of them.