Seth Grahame-Smith, who also penned the screenplay for The Flash from a treatment by Phil Lord and Chris Miller, was supposed to make his feature directorial debut, and some say creative differences forced him to leave the project. TheWrap thinks otherwise, “Warner Bros. is said to be pleased with Grahame-Smith’s script, but ultimately wanted a more experienced filmmaker guiding the production“. In the wake of the response to Batman v Superman, I think they might be right and looking for a director with a bit more mileage is the correct course of action here. The Flash is still supposed to come out March 16th 2018, so they are looking to start production before the end of the year, leaving Warner Bros. with enough time to find a replacement for Seth Grahame-Smith.
After his cameo in Batman v Superman: Dawn of Justice, Barry Allen/The Flash (Ezra Miller) will be seen next in Justice League Part One, which is now shooting under director Zack Snyder.
The James Wan (who is set to direct Aquaman) thing might be nothing more than a rumor, but if it does come to fruition, I’ll keep you posted.