Joss Whedon for Avengers April 2, 2010 Buffy creator gets set to Avenge? Buffy creator Joss Whedon is reportedly on the shortlist to direct Marvel’s upcoming Avengers movie. According to IESB, the director is at the top of the list of candidates to helm the superhero picture. Whedon has a history with Marvel as a comic book writer for Astonishing X-Men and The Runaways. Whedon’s representatives have not confirmed the claim.