Vertigo's Preacher is considered one of the all-time great comic books. It's about a Texas preacher named Jess Custer who is possessed by an entity known as Genesis, the offspring of an angel and a demon. This being gives Custer the ability to control the will of anyone who comes into contact with as he travels the American heartland searching for God.
Created by Garth Ennis and Steve Dillon, Preacher is a prime example of a non-superhero comic book that could make for a brilliant movie, and Columbia Pictures seemed to agree. In the late 2000s, the studio hired Sam Mendes to direct a feature adaption of the movie after HBO decided not to pursue a TV miniseries version. Plots were outlined and scripts were written, but budget and content concerns continuously delayed the movie.
Mendes has gone on record to say he couldn’t find the right tone, which has led to a consensus that the source material may be too difficult to adapt. Ever since then, development on Preacher has grinded to a deafening halt, and we’re not holding out hope that it will ever see the light of day.