This won’t be Koepp’s first swing on the jungle vine, as the screenwriter, who also wrote Spielberg movies The Lost World: Jurassic Park and War of the Worlds, co-wrote the previous Indiana Jones movie, Indiana Jones and the Kingdom of the Crystal Skull.

Plot details are being kept secure in the Well of the Souls. It is unclear if Koepp is working off any existing treatment or story. Crystal Skull, for example, had treatments written by Indiana Jones co-creator George Lucas and the story credit went to Lucas and Jeff Nathanson, the latter of whom wrote several drafts.

Lucas' involvement in the new movie project remains unclear. He was not mentioned in Disney's announcement this week, and if the new Star Wars movies are any indication, he will not be involved. (He was vocal in saying Force Awakens did not use his ideas.)

Also unclear is how the script will address the age factor of Ford, who will be 77 years old when the new movie is released on July 19, 2019. The script, for example, could call for the story to be a flashback set in a classic Jones time period (the 1930s) bookended by Jones in later decades.

Koepp is one of Hollywood’s A-list writers, with credits such as the first Mission: Impossible and the first Spider-Man (Sam Raimi’s 2002 version that starred Tobey Maguire).

More recently, he wrote Jack Ryan: Shadow Recruit and Inferno, Sony’s upcoming adaptation of the Dan Brown novel that stars Tom Hanks. Koepp has also directed several movies.

He is repped by CAA and Myman Greenspan.