Basically, I liked the movie more in the beginning when everything was heartfelt and a little goofy, and less towards the end when everything was laser guns and explosions. It just became this hackneyed action flick with a bunch of elements hijacked from other, better films.
I saw Wrath of the Titans tonight, and get this: It was good. In fact, it was pretty damn good. Clash of the Titans sucked, but this movie couldn't have existed without it because they build on a lot of the stuff introduced in that one here. I saw the vanilla version, 3D is for chumps.
And another thing, this movie had an ending. As in, it ended. There were no overt allusions to unfinished business. I don't know how they would justify it, but I actually wouldn't mind if they made another sequel.
If someone wanted to go to a movie, and their options were John Carter, The Hunger Games, and Wrath of the Titans, I would recommend Wrath without hesitation.