As it turned out, Blunt indeed landed what could be her breakout role, except it won’t be alongside Marvel’s Tony Stark in "Iron Man 2," but rather with Jack Black in Fox’s “Gulliver’s Travels.” In a conversation with MTV News, Blunt spoke out about having to drop out of “Iron Man” because of a scheduling conflict with “Gulliver’s.”

“It was one of things that was conflicting,” Blunt told MTV News. “So it’s a shame the two of them couldn’t work together. It just got complicated, so I think I had to pull out for my own sanity more than anything.”

Pulling out meant leaving behind the opportunity to work with co-stars like Robert Downey Jr., Samuel L. Jackson and Mickey Rourke, as well as the chance to take part in what will surely be one of 2010’s most anticipated movies. The fate of “Gulliver’s” is somewhat more uncertain, although that adaptation of the classic Jonathan Swift tale comes with its own pedigree. In addition to Black, the film stars one of the hottest actors in comedy, Jason Segel, and will be helmed by “Monsters vs. Aliens” writer/director Rob Letterman.

Even though she’s left “Iron Man 2” behind, Blunt was reluctant to dish any info about the still-secretive plot—not even a hint if Black Widow will be Stark’s love interest or adversary.

“See, that’s the other thing, I can’t give anything away on that front,” she said. “I’m not going to say! I’m not going to say! I’m going to get someone in trouble. Look at me, I’m such a goody-two-shoes!”

Which means that for all her Hollywood success, she still hasn’t gotten used to the ethos of Tinseltown. “It’s all about back-stabbing here,” she joked.

Did that mean she wouldn’t take a shot at the actress assuming the Black Widow role, Scarlett Johansson? Even though Scar-Jo reportedly screen-tested for the gig and lost out to Blunt?

“She’ll do a great job,” Blunt said, choosing her words carefully. “She’ll get up on that high-wire and do a great job.”

Who'd make a better Black Widow--Blunt or Johansson? Who'd you rather work with Downey Jr. or Black?