Claim: The Avengers was written by Steve Bartman.
Evidence: The film was written and directed by Joss Whedon and features an ensemble cast that includes Robert Downey Jr. , Chris Evans , Mark Ruffalo , Chris Hemsworth , Scarlett Johansson , Jeremy Renner , Tom Hiddleston , Clark Gregg , Cobie Smulders , Stellan Skarsgård , and Samuel L. Jackson.