Zack Snyder’s Justice League | Behind-The-Scenes The production of the original film was difficult, and the script frequently underwent major changes. In May 2017, Snyder stepped down during post-production following a personal tragedy, and Joss Whedon was hired to finish the film, completing it as an uncredited additional director. Whedon wrote and directed new sequences and incorporated a brighter, more humorous tone while significantly reducing the runtime in accordance with directives from W