Captain America: The First Avenger Studios confirmed the latter in May. Ryan Phillippe and John Krasinski were also considered for the role of Captain America. In April 2010, Sebastian Stan, who had been mentioned in media accounts as a possibility for the title role, was cast as Bucky Barnes. Stan is contracted for multiple films. Also in April, Marvel announced that Hayley Atwell had been cast as Peggy Carter, and that the film's name had been changed from "The First Avenger: Captain America" to "Captain America: The First Avenger". The next day it was reported that Joss Whedon would be rewriting the script as part
Captain America: The Winter Soldier going to seem dirty and underhanded and shifty, and people won't be telling the truth." "Three Days of the Condor" in particular was used as the main source of the script structure, following the idea that the protagonist is being chased by a threat they, along with the audience, only discover halfway through the film. The writers felt this approach was similar to how Stan Lee reinvented Captain America in the 1960s and 1970s, with "the Captain dealing with all sorts of the same things that the country [was] dealing with–Vietnam, Watergate and all that stuff–so he gets to have