Jon Favreau: Robert Downey Jr. Helped Re-Write Iron Man 2 Robert Downey Jr is reportedly helping to rewrite the script for Iron Man 2. Director Jon Favreau described Downey Jr as a “real partner” in an interview with Empire: “He’s been very involved in the screenplay. When he went away to do Sherlock Holmes he was still part of our creative process,” he said. “Even in the first film, where he was originally a hired gun playing the role, he really stepped up to rewrite scenes – he’s a great writer, too. So we really are sharing the responsibilities.” Downey Jr said that producers have resisted the urge to “skate through a sequel”. “We are grinding our minds and hearts in the ground on this movie,” he said.