During the four unproductive years that Spielberg was attached to the project as director, Indy 5 was being scripted by his tentpole go-to, David Koepp, with a break in the middle there during which Jonathan Kasdan and then allegedly Dan Fogelman took a stab at the intractable installment.
Mangold is an accomplished screenwriter himself, so when he took over directorial duties it seemed likely he would have a hand in the script that would ultimately be produced. Now we know:
That this is the same writing team that brought you Ford v Ferrari is probably a good thing, as good things have been said about that movie. Plus, if you’ve dealt with one Ford, you’ve dealt with them all, so Mangold probably knows what he’s doing here.