Warner Bros.

• A solo movie starring Ezra Miller, who repeated her role as "Justice League," is being rejected, according to Variety.
• The script of the film is undergoing changes, and programming conflicts would arise when Miller also stars in the series "Fantastic Animals."
• The film has faced development challenges, as directors. John Francis Daley and Jonathan Goldstein were hired to replace Rick Famuyiwa, who left due to creative differences in 2016.

The Flash may be the fastest man in the world, but he is taking his time to return to theaters.

According to Variety, a solo movie starring Ezra Miller, which would reprise her role as "Justice League", is being rejected. Not only is the script undergoing changes, but Miller's obligations to the "Fantastic Beasts" series, where he plays the wizard Credence Barebone, could also interfere.

The second film of the spin-off series "Harry Potter" hits theaters in November, and the third begins shooting in July. According to Variety, the Flash movie was expected to start filming in March, so there would be scheduling conflicts, and the Warner Bros. studio does not think the script is ready in time.

The film is now expected to be released in 2021.

The film never received official green light and has faced development problems for some time. After director Rick Famuyiwa left due to creative differences in 2016, the directors of "Game Night" and the writers of "Spider-Man: Homecoming" John Francis Daley and Jonathan Goldstein were hired to replace him.

After the failure of the "League of Justice" at the box office, it raised only $ 229 million nationally and $ 657 million worldwide. Warner Bros. has reevaluated its superhero movie strategy. The next films will focus on independent stories instead of a shared universe. They include "Aquaman" in December and "Shazam!", "Wonder Woman 1984" and "Joker" next year.