Last week, at the Los Angeles press conference for Marvel's The Avengers, star Robert Downey Jr. revealed his cast mates were assembling that night to shoot a new scene. Producer Kevin Feige confirmed that additional shooting did take place, although it wasn't for an entire scene.

"I will tell you this: It was not a scene. It was not a scene. There's little things. It's been blown out of proportion. Which is fun, I like that things are blown out of proportion. Sometimes they're true sometimes they're not. There is the potential that there will be one little change. People might not even notice it. It's not a big thing."
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We'll have to wait and see on May 4 if this last-minute filming has any impact on director Joss Whedon's superhero assemblage.