Josh Whedon is close to signing a deal with Warner Bros. to write, direct and produce an as-of-yet-untitled Batgirl standalone movie, according to a report by Variety.

Whedon is best known for creating the television series ‘Buffy the Vampire Slayer’ and ‘Firefly’, as well as directing The Avengers (known as Avengers Assemble in the UK) and its sequel, Avengers: Age of Ultron, both of which were part of the Marvel Cinematic Universe.

Batgirl is the name of several different DC superheroes, but the most well-known incarnation of the character is that of Barbara Gordon, daughter of longstanding Batman supporting character Commissioner James Gordon. Batgirl made her debut in 1967’s Detective Comics #359, “The Million Dollar Debut of Batgirl!” by writer Gardner Fox and artist Carmine Infantino.

The first live-action Batgirl was played by Yvonne Craig in the 1960’s Batman TV series. Since then, the character’s appeared in a variety of different media, most notably in supporting roles in a number of animated series. 1997’s Batman & Robin had Alicia Silverstone play Batgirl and most recently, Rosario Dawson provided the voice for the character in The LEGO Batman Movie.

The standalone Batgirl movie will be part of the DC Extended Universe, the cinematic universe that started with 2013’s Man of Steel and includes Batman v Superman: Dawn of Justice, Suicide Squad and the upcoming Wonder Woman and Justice League movies, among many other pending releases.

There is no set release date as of yet for the untitled Batgirl movie.