If you see it, be sure to stick around through the credits of the final scene after the credits complete. Tony Stark walks into his house and Nick Fury, boss of SHIELD (played by Laurence Fishburne) is waiting there to talk to him about getting involved in the "Avengers Project"
It’s Samuel L. Jackson.
My friends and I LOVED the scene at the end (though isn’t that Samuel L. Jackson?) because it set up a sequel/spin-off Avengers movie =D
Actually, I really like the entire movie. It reminded me a lot of Transformers, but with a little more of some important things like plot and writing and character development instead of just being a couple hours of special effects. Plus, Pepper has to be one of my favorite female characters in a superhero movie ever.