Because Emily Blunt's commitment to Twentieth Century Fox and the studio's upcoming Gulliver's Travels movie may prohibit her from costarring in
Iron Man 2, Marvel is in discussions with other actresses, most significantly Scarlett Johansson, to take her place, EW has learned exclusively.
Marvel will not confirm, but sources around Hollywood say Johansson has indeed met with the filmmakers and is interested in taking the role of Russian superspy Natasha Romanoff, who doubles as Black Widow.