The score begins with pompous "Thor: The Dark World". As the title already betrayed, also the main theme is contained therein, which fits fantastic in the movie.
I myself am a big fan, the composition of Patrick Doyle. This has created a wonderful soundtrack for the first part of Thor. Nevertheless, the second part is very different. He's a lot Action-packed and fast. This is also reflected in the soundtrack. This still offers some very quiet emotional title.
On the whole, it is a wonderfully successful composition. I especially like the development of Brian Tyler.