At the San Diego Comic Con in 2010, Wright confirmed that his script is an origin story, and that doesn't work for Marvel's chronology to include Ant-Man in The Avengers. Wright stated in January 2011 that he resumed writing the script for the film. During a Q and A at SXSW for Cornish's movie Attack the Block, Wright and Cornish stated that they had been recently rewriting the script. While attending Kapow-Con in April 2011, Cornish revealed that Wright and he had delivered the second draft to the studio. Then on July 2011 Edgar Wright and Joe Cornish delivered a third draft and some concept art to Marvel Studios.
Kevin Feige confirmed that Henry Pym is referred to in the film Thor as the friend that Dr. Selvig e-mails that had previous "experience" with SHIELD, though his name was cut out of the scene.