Iron Man 3 has more. Twice the villains. Five times the Iron Men. More girls for Tony Stark. Pepper Pots finally gets some action scenes. But I like the guy with the English accent the best- even better than Australian hunk. Anything more and you could end up with a spoilt ending. Hollywood gives us movie sequels knowing we are suckers for watching how the story will turn out. This edition though was not so great as the last Avengers universe franchise. Go with lowered expectations or with your kids, and you will be okay.
On and one more thing! At the end of ALL the credits- the Dr Bruce Banner makes a 2 minute nice appearance. Witty! The movie just make a big hit financially but alarm bells should ring in the Avenger sequel universe. Especially since Star Trek and Super Man are just here!