British actress Emily Blunt is being named to portray Russian super-spy Natasha Romanova in Iron Man II. It's pretty obvious this also means they want her in the Avengers movie.
At this point, it looks like they're definately trying to model the Avengers movie off of The Ultimates. It's formed by SHIELD, under the leadership of the Ultimate (AKA Sam Jackson) version of Nick Fury, which unfreezes Captain Amerca at the beginning, the Avengers are going after The Hulk as their first mission, and to top it all off, it looks like Natasha will be posing in a position right under Tony's nose, before revealing herself as a government agent.
Here's hoping she's got what it takes!