Director involvement is no guarantee a film will be made, though Christopher Nolan generally completes projects he begins. In contrast, Guillermo del Toro, a three-time Academy Award winner, has spent years on films that never progressed beyond development, losing over a decade on unrealized projects. Nolan's status as a celebrated filmmaker means it is rare for him to be attached to a movie that never materializes.
The only two films Nolan left before completing The Dark Knight, his first billion-dollar hit, highlight this rarity. Contrary to popular belief, the Howard Hughes biopic is not among them. Nolan’s version was shelved after Martin Scorsese’s took precedence and was poised to be a major role for Jim Carrey. However, Nolan did not formally exit that project; its cancellation was beyond his control.
He did, however, step away from The Prisoner, an adaptation of the 1960s television series he had planned to direct.
“Nolan was crushed when his version of the [Howard Hughes] story was mothballed after Martin Scorsese got his in front of the cameras first.”
This demonstrates Nolan’s rare but significant decision to leave a project, underscoring his general commitment to seeing films through.
Christopher Nolan rarely abandons films once attached, with only two notable exceptions before his breakthrough, reflecting his strong dedication to completing projects.