If it had been the finally moment of Thor's hammer at the end of the credits, I doubt I would bother bringing it up, but there are numerous scenes with a chubby Samuel L. Jackson as Nick Fury that add very little to the actual plot of an angry Ivan (Mickey Rourke) coming to get revenge on Tony Stark (Robert Downey Jnr) for having had success, while he has laboured in a vodka haze looking after his angry, dying father. Oh, sure, there's the subplot of Tony dying from the technology in his chest, which Fury conveniently shows up to help fix, while also allowing for Captain America's shield to be used as a stand. Jackson's SHIELD group is tied in cheaply with Scarlett Johansson's Natasha Romanoff, and with Stark's over father, but mostly it's just a distraction that gets in the way of the character conflicts between Stark and Gwyneth Paltrow's Pepper Potts and Don Cheadle's James Rhodes, who steals an Iron Man suit after Tony pisses in his.
Otherwise, like I said, the film is pretty decent, and if you enjoyed the first one, no doubt you'll like the second. Downey's Tony Stark is still a charming, quick talking eccentric, and much of the film's success is owed to director Jon Favreau for giving his actors a preference over the action scenes, armour, and special effects. Of course, he also gives Jon Favreau as Happy more screen time in the film, which is kinda unnecessary, and somewhat self gratifying, if you're aware of the fact that the director and the actor are the same person. But, it's hard to fault someone who said yes to Mickey Rourke as the angry, code breaking, tattooed physicist, and then gave him a bird. In fact, really, if the entire film had been Downey and Rourke in a room discussing the bird, I probably would have enjoyed it to a degree. Well, maybe.
Either way, the film is pretty decent, and worth the time if you've got nothing else going on.