Chris Hemsworth and Tom Hiddleston return as Thor and Loki, respectively, in the direct sequel to The Avengers. Now imprisoned on Asgard by his brother, Loki is soon freed when a much greater threat looms large and threatens to destroy all that Thor has suffered for. Definitely not the best Marvel film made, The Dark World is an interesting watch because it's basically the weakest of the entire Marvel Cinematic Universe.