 He changed the Vietnam War origin of the character to Afghanistan, as he did not want to do a period piece.Art Marcum & Matt Holloway were hired to write the script, while Mark Fergus & Hawk Ostby wrote another version, with Favreau compiling both teams' scripts, and John August then "polishing" the combined version.Comic book staff Mark Millar, Brian Michael Bendis, Joe Quesada, Tom Brevoort, Axel Alonso, and Ralph Macchio were also called upon by Favreau to give advice on the script.