Barry Keoghan may have ended up with a different iconic role in The Batman, but the process started with him recording an unsolicited audition to be The Riddler. The video's been online for years, but almost no one had seen it previously.
DC Comics has solicited the first issue of their prequel to 2023's The Flash, and for some reason, one of the covers features a naked rendition of Ezra Miller's Barry Allen.
The Batman director Matt Reeves has considered whether Barry Keoghan's Joker might return in the future, noting that a project in the "Arkham space" has already been discussed.