I am – Hercules!!
Emily Blunt, who formed a level of management between Meryl Streep and Anne Hathaway in “The Devil Wears Prada,” is said to be up for a character in "Iron Man 2," possibly one of Tony Stark’s future fellow Avengers. From Nicole Sperling at Entertainment Weekly:

… sources say Emily Blunt (The Devil Wears Prada) could play a lead character named Natasha, who goes by several aliases, including the Black Widow. Blunt is apparently one of many actresses the fillmmakers are considering, though she's believed to be the front-runner.

Soviet superspy Natasha Romanoff made her initial Marvel Universe appearance in the Iron Man feature of 1964's Tales of Suspense #52. Funny thing about Blunt is it was hard to notice how beautiful and charismatic she was in “Prada” because she was so overshadowed by Hathaway’s otherworldly hotness. But I recently saw Blunt playing an American in “The Jane Austen Book Club” and I could hardly take my eyes off her – even though Maria Bello and Maggie Grace were often lurking nearby. Find all of the EW story on the matter here.