Thor: The Dark World continues the adventures of Thor as he battles to save Earth and the Nine Realms from a dark enemy that predates the universe. We join Thor (Chris Hemsworth) in battle, fighting to bring peace to the Nine Realms, a task that will eventually lead to him being King of his home world of Asgard but an ancient race the Dark Elves led by the vengeful Malekith with the goal of plunging the universe back into darkness. When Thor's human love, Jane Foster (Natalie Portman) is drawn into the fight when she inadvertently discovers a powerful weapon that Malekith has been seeking for thousands of years, Thor must disobey his Father's orders and enlist the help from his brother-turned-traitor Loki (Tom Hiddleston) to save us all.
As far as comic book movies go, Thor: The Dark World is a very good movie with a feeling of an older fantasy adventure film of the '80s. While this is a big action movie, the characters are what really drive the story and make the film. Brining in talented actors to play comic heroes is the smartest move that the modern comic movie producers have done. More focus on story on characters and let the visual effects take care of itself seems to be a winning formula. I really didn't find any faults with this movie. It's not an Oscar contender but it's definitely entertaining.
Marvel and Disney are very smart in their approach to the comic universe. Every film is planned out carefully to tie in with the overall scope of The Avengers with interweaving and continuing plotlines, character crossovers, hidden gems throughout the film, and post-credit scenes that leave the viewer anxious for the next comic book movie. Thor: The Dark World is no exception by tying in the events from The Avengers, featuring a very brief and comical appearance from a fellow Avenger (not to mention the plotline centering on Loki), and a mid-credits scene that helps set up 2014's Guardians of the Galaxy. There's also a post-credits scene so stick around for that as well.