According to Entertainment Weekly, Scarlett Johansson is rumored to be replacing Emily Blunt in the upcoming "Iron Man 2" film. She is said to have already met with filmmakers regarding the project.
Due to a previous commitment with 20th Century Fox for the film "Gulliver's Travels", co-starring Jack Black, Blunt may have to drop out of the role of Russian spy Natasha Romanoff, a.k.a. the Black Widow.
Iron Man 2 is scheduled to be released on May 7, 2010, but that could change due to the fact that no shooting script or start date has been set yet.