It has been revealed that 'Iron Man' director Jon Favreau has already begun work on the sequel.
The Los Angeles Times quotes the director as saying: "We're working on it now, which hasn't been officially announced."
Favreau said that the film would be released in 2010.
The newspaper says that 'Tropic Thunder' writer Justin Theroux is writing the script and that Marvel Studios and Paramount Pictures desire to have the film in cinemas on 30 April 2010.
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