It's Andy Muschietti in talks to direct The Flash, with Christina Hodson possibly writing

In March, Ezra Miller announced a plan to jumpstart the long-delayed Flash movie by teaming up with legendary comic writer Grant Morrison to write a whole new script, scrapping whatever previous writers and directors (including Rick Famuyiwa and Game Night duo John Francis Daley and Jonathan Goldstein) had done in favor of something that was reportedly a darker and grittier take on the character—if you can believe that Warner Bros. would go for such a thing. Miller is still attached to play the Scarlet Speedster if this movie ever happens, reprising his role from Justice League and that unexplained cameo in Batman V Superman: Dawn Of Justice, and apparently he was so keen on getting back in the red suit that he and Morrison turned in their script pretty quickly after the reports about it came out.