The Hollywood Reporter has learned that Primetime Emmy-winner Billy Crudup (Watchmen; Justice League; The Morning Show) is back in talks to join the cast of The Flash, which has Andy Muschietti (It; It Chapter Two; Mama) in the director's chair and Ezra Miller (Fantastic Beasts; Justice League; Suicide Squad) attached to reprise his role as the titular speedster.
Crudup was actually one of the first cast members confirmed in 2016 when Rick Famuyiwa was still at the helm, but ultimately had to leave the project as it began to go through multiple different directors and production delays, which continued over the past four years. However, with Muschietti now set in stone and a fresh script from Christina Hodson (Birds of Prey; Bumblebee), the studio was able to re-approach him, and it looks like things are moving in the right direction.
In addition to Miller, Crudup joins a cast that will feature Michael Keaton (Batman; Batman Returns; Spider-Man: Homecoming) and Ben Affleck (Batman v Superman: Dawn of Justice; Suicide Squad; Justice League) reprising their roles as different iterations of Bruce Wayne/Batman in a film that's expected to fully explore the DC Multiverse.
THR also notes that while Kiersey Clemons (Justice League; Dope; Scoob!) was initially on board to appear as Iris West, her status remains up in the air for now, as WB will have to strike a new deal with her, and it's uncertain whether she's interested in returning or if she'll be available when filming is set to begin next year in London.