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 First Avenger team of that name, and in November Johnston refuted speculation that the Sub-Mariner, an Invaders team-member in the comics, would be included. Johnston later explained that "the Invaders" had been discussed simply as a possible name for the squad of commandos Captain America leads in the film. Christopher Markus, one of the screenwriters, said the unnamed group was "called the Howling Commandos in the script, but no one says that out loud." The design as a whole tried to create technology that could be built in the 1940s, though with the added Cube technology in Hydra's case. Abandoned Nazi projects