In an interview with The Guardian, the 44-year-old star gave an update on the project, tentatively titled "The Batman," which he is slated to direct and star in.
"That's the idea. But it's not a set thing and there's no script. If it doesn't come together in a way I think is really great I'm not going to do it," the actor said.
It's not the first time the actor has seemed ambivalent about making the DC Comics film, which is set to star Joe Manganiello as Deathstroke and is projected to open in 2018.