A poster presented by Marvelous News, and the closest look we've ever seen of Black Widow, reveals that the costume Scarlett Johansson rocks as Natasha Romanoff includes the famous Black Widow symbol on her belt (though I've never noticed it in the trailers).
Wondercon takes place in San Fransisco, CA this weekend. You can get your own Iron Man 2 mini-poster at WonderCon. Stop by the WonderCon Booth (#242) to pick up your free poster