Affleck will work with director Zack Snyder and screenwriter Chris Terrio on the script and weigh in on post-production.
Affleck has directing credits on “Gone Baby Gone” and “The Town.” He also produced, directed and starred in “Argo,” which won him a best picture Oscar. Terrio won the best original screenplay Academy Award for the same film.
Affleck also nabbed a screenplay Oscar with Matt Damon for “Good Will Hunting.”
Snyder began shooting “Justice League: Part One” in April with Henry Cavill, Gal Gadot, Ezra Miller, Jason Momoa, Ray Fisher, Amy Adams, Amber Heard, Jeremy Irons, J. K. Simmons and Willem Dafoe. The film is scheduled to be released on Nov. 17, 2017, with “Justice League Part Two” set for June 14, 2019.
Affleck also announced in April at Cinemacon that he would direct and star in a standalone Batman movie. Warner Bros. has already planned a sprawling slate of movies in the DC universe through 2020, with “Suicide Squad” slated for Aug. 5, the two “Justice League” pics, “Aquaman,” “Cyborg” and “The Flash.”
“Batman v Superman,” starring Affleck and Cavill, turned out to be mildly disappointing for Warner Bros. with worldwide grosses hitting $865 million. Snyder directed from Terrio’s script.
The news was first reported by Deadline Hollywood.