I have not seen this yet, but the critics are all over the place with this movie.
Roger Ebert gave it three stars:
http://www.rogerebert.com/reviews/thor-the-dark-world-2013
There are just as many scenes where inherently exciting characters, like Thor, kill time connecting plot points. Watching Thor make quick work of an inconsequential enemy in an opening scene should be fun. But the scene has no flair to it, and feels like a perfunctory introduction to the character. The first scene in the film where Hemsworth gets to be really charming comes later, when he's squabbling with Hiddleston about operating a commandeered dark-elven space-ship. The squabbling itself isn't that funny, but the scene's pay-off is. Hemsworth's eyes light up as he gets the ship to fly, instantly reminding you why you came in the first place.
Still, more often than not, "Thor: The Dark World" is more busy than exciting. There are a couple sub-plots too many, like the one with frequently-naked super-scientist Erik Selvig (Stellan Skarsgard). And too many characters that are introduced with a promising scene, like Rainbow Bridge guardian Heimdall (Idris Elba), are forgotten during the film's climactic battle. The film's world also generally looks slapped together, especially the dark elves, who look like a cross between "Land of the Lost"'s Sleestaks and "Doctor Who"'s Cybermen. Visually, "Thor: The Dark World" is a step back after "Thor," which at least looked unique enough.
Rotten Tomatoes gives it five stars so far (sample of reviews shown):
http://www.rottentomatoes.com/m/thor/
Anybody rush out to see this yet? I think Ill see it "at home" I see that the silly 3D is being pushed again. I really wish that Hollywood would get it that people arent going to just shell out double money to see this in 3D, or any movie in 3D. Some will, but most wont.