"He's contracted to do at least Justice League One and Two, so at least three times wearing the cape," he says, adding, "There's a script that he's written that is a really cool [Batman] idea, so that's out there as an option."

This isn't the first time the prospect of an Affleck-originated Batman movie has been raised. During San Diego Comic-Con last year, THR reported that the actor-director was developing a stand-alone Batman project with DC Entertainment chief creative officer Geoff Johns, with Affleck tentatively attached to direct as well as star.

In addition to the movies Whitesell mentioned, Affleck's Batman also will make a cameo appearance in August's Suicide Squad, which includes a number of the hero's comic book villains as lead characters. His rumored presence was confirmed in footage from the movie released during Comic-Con last year.