The project was announced at the Warner Bros. Comic-Con panel on Saturday, where Affleck was was in attendance.
The actor will direct and star in the film as the Caped Crusader.
Its like taking on a great play.

Credit: Clay Enos
Its been reinvented so many times, its terrifying but its exciting, Affleck said.
After the panel, Affleck tweeted a logo for the Batman standalone film.
Talk of a Batman solo movie has been happening for a while.
Thats something that would have to pass a very high bar for me.
Its not just like, Yeah, that might be fun, lets go try this out.
Affleck starred inBatman v Superman: Dawn of Justiceas Batman, and will play the character again inJustice League.