Update (June 28): As reported by Variety, Indiana Jones 5 will not make its original release date of July 10, 2020.
Filming was reportedly supposed to commence in April of 2019, though Variety’s sources claim the shoot will be set back by months, perhaps even a year or more.
The delay is reportedly due, in part, to Jonathan Kasdan taking over the script from David Koepp, though Lucasfilm and Kasdan have reportedly not yet finalized the deal for him to do so.
Original story follows:
Jonathan Kasdan, co-writer of Solo: A Star Wars Story, reportedly has been brought on by Lucasfilm to replace David Koepp as writer on Indiana Jones 5.