The Flash standalone film starring Ezra Miller has had its production delayed, potentially pushing its release into 2021.
As reported by Variety, Warner Bros. is delaying the beginning of filming, with production expected to commence sometime in late 2019. Because of this late start, it could very well end up sliding to a 2021 release.
The film had originally been expected to start shooting in March 2019, though this was pushed back because its script is reportedly still being worked on. To compound the issue, Miller might now have scheduling conflicts due to his ongoing role in the Fantastic Beasts films, the third of which begins shooting in July.
Source: IGN.com The Flash Solo Film Delays Production, May Not Come Out Until 2021