There is gossip that the new Iron Man movie being developed for release in 2010 may not be based on Marvel comics newest epic Demon In a Bottle. The comic book depicts Tony Stark (played by Robert Downey Jr.) battling with his demon: Rum and filming is due to start in March 2009. Demon in A Bottle is seen as one of the freshest story lines yet in the 15 years since the first Iron Man comic hit the shelves but the Director, Jon Favreau, is concerned that the film may be too similar to Will Smith's character in Hancock.
Favreau told Collider that, "Comic book fans might see "Demon in a Bottle" as a fresh story line, but I haven’t seen Hancock yet. From what I’ve seen it seems there is a lot of imagery that seems to be shared. Him flying through billboards and things. The idea of the hero whose biggest enemy is himself, and him fighting through his demons [may be played out, so] you want to come at the audience with something fresh."