Director Rick Famuyiwa, who made waves with his coming of age Sundance Sensation Dope, has left Warner Bros. and DC films, “The Flash” over the creative differences.

Famuyiwa has been on board since June Developing the project and his departure will likely mean the delay of the movie’s start of production and release as Miller has a commitment in July.

“When I was approached by Warner Bros. and DC about the possibility of directing The Flash, I was excited about the opportunity to enter this amazing world of characters that I loved growing up, and still do to this day,” Famuyiwa said Monday in a statement

Famuyiwa gained notoriety for his 2015 indie darling “Dope”, and the big studio tentpole represented the biggest opportunity of his career thus far.

The movie, which is to star Ezra Miller as Barry Allen, the Fastest Man Alive, was in preproduction as it headed toward a March 2017 start date with a release date of March 16, 2018.