Iron Man 2
Really wanted this to be utterly great, but sadly it only made it to "good, with some great bits".
It's all well and good giving Rhodes' "War Machine" outfit its proper technical name from the comics at one point, or throwing in a less-than-subtle nod to Captain America, but when it's at the expense of giving proper development to Tony and Pepper's relationship, or adequately addressing the legitimate grievance Ivan Vanko (who, curiously, doesn't seem to be named as Whiplash onscreen at any point) has with the Starks, the overall sense of coherency can't help but suffer.
Despite the flaws, it's still worth seeing if you're a fan of (a) the first film, (b) Marvel Comics or (c) Scarlett Johansson in her bra. And make sure you stay until the end of the credits for the easter egg teaser scene that we DIDN'T BLOODY GET AT THE PREVIEW SCREENING.