Cobie Smulders Almost An Avenger - Comic Book Resources: The article says that Smulders is "wrapping up a deal" for the movie which apparently begins filming this April for a May 4, 2012 release. This places the actress above other noted contenders for the role including Morena Baccarin, Jessica Lucas and Mary Elizabeth Winstead. And while Smulders isn't one of Whedon's regular featured players, she does share TV time each week with former "Buffy" star Allison Hannigan and was noted by Whedon as his top choice to play Wonder Woman when his film pitch on that superheroine fell apart.