As Marvel gears up for the release of Thor: The Dark World in three weeks, the production company has been releasing teaser clips, including two brand new never-before-seen ones of Thor (Chris Hemsworth), Sif (Jaimie Alexander) and Malekith (Christopher Eccleston).

Loki fans won't have to wait long to see their favorite Marvel villain.

To the excitement of its fans, Marvel's blockbuster sequel Thor: The Dark World will be launching in theaters this upcoming fall.