Now, IGN has exclusively revealed that the full title for Thor sequel might be Thor: The Darkest World 

Exploring Thor’s relationship with the Asgardian all-father Odin, as well as earthbound companion Jane Foster, “Thor 2” follows the God of Thunder to other worlds beyond Asgard and earth. With the Warriors Three tagging along, among other Asgardian warriors, more mythical Norse creatures are expected. “Thor 2” stars Chris Hemsworth, Natalie Portman, Anthony Hopkins, Tom Hiddleston, Idris Elba, Jaimie Alexander, Zachary Levi, Tadanobu Asano, and Ray Stevenson. Alan Taylor (“Game of Thrones”) takes over directorial duties from Kenneth Branagh, who helmed the first “Thor” film. And “Thor 2” hits theaters November 8th, 2013.