Jon Favreau's Iron Man 2 sadly doesn't match the great emotional highs of other superhero "part twos" like Spider-Man 2 , The Dark Knight or X2: X-Men United .
It's the fact that great-to-good comic book-style movies like " The Dark Knight ," " Spider-Man 2 ," " The Incredibles " and, yes, even "Iron Man" are interested and invested in clear, coherent and competent storytelling, while bad-to-bland comic-book-style movies like " Spider-Man 3 ," "Batman & Robin" and, yes, "Iron Man 2" are interested and invested in throwing characters on-screen and nodding to comics history so that comic book readers can use their normally useless storehouse of information about these mythologies to play connect-the-dots.
The superhero genre doesn't necessarily require good acting, but when it's there (as in " Iron Man " and " The Dark Knight "), that takes it up a level.
Iron Man 2 doesn’t stand alongside the great superhero sequels like The Dark Knight, Superman II and Spider-Man 2, but it’s far better than the disasters that were Batman & Robin and Spider-Man 3. Favreau and Downey Jr. have done their jobs well with ultimately forgivable exceptions.