Edgar Wright plans to direct an action-adventure film with comedic elements, insisting that Ant-Man would not be a spoof. The script has been written by Wright and Joe Cornish, who plan to include both Henry Pym and Scott Lang as major characters, with Pym as Ant-Man in the 60's in Tales to Astonish style, and a flashforward to Lang as Ant-Man's successor in contemporary times.

In February 2007, Wright said that the project was in "a holding pattern" while the script was revised, with casting yet to begin. The director reported that he would have news for the film in a few months. He has been researching nanotechnology for the film. As of March 2008, Wright told Empire magazine that a second draft of the script is being written. Known for being a comedic writer, the director noted that the film would not be overtly comedic, but that it would be "more of a full-on action adventure sci-fi film but with a comedic element."