There's a new trailer (via TheMovieBox) for a documentary premiering at SXSW called Wonder Woman! The Untold Story of American Superheroines. Its about the history, evolution, and influence of the comic book character of Wonder Woman.

Check out the full 3 minute long SXSW promo for a film going behind the scenes with Lynda Carter, Lindsay Wagner, comic writers, artists and real life superheroines like Gloria Steinem, Shelby Knox and others. Trailer after the jump!