We don't know all that much about the Thor sequel, Thor: The Dark World, other than that much of the cast will be reprising their roles and Christopher Eccleston will portray Malekith the Accursed (and presumably be the prime antagonist of the film). But where does this leave Thor's brother, Loki, in the film? Potential spoilers below...

Last we saw the pair, they were returning to Asgard with Loki in shackles. We know that actor Tom Hiddleston will be reprising the role because he's listed in the official synopsis for the film. According to Icelandic website Visir, a scene was filmed in Iceland with "about 500 people (on the set)" that involved "a big fight scene between Thor and Loki."

Plus, Hiddleston tweeted this cryptic message a few days ago confirming his presence in Iceland.

Sometimes the answer is to climb the nearest mountain and everything is better. Literally. Not a metaphor. #iceland

— Tom Hiddleston (@twhiddleston) October 16, 2012

In Thor: The Dark World, Thor fights to restore order across the cosmos...but an ancient race led by the vengeful Malekith returns to plunge the universe back into darkness. Faced with an enemy that even Odin and Asgard cannot withstand, Thor must embark on his most perilous and personal journey yet, one that will reunite him with Jane Foster and force him to sacrifice everything to save us all.

Starring Chris Hemsworth, Natalie Portman, Tom Hiddleston, Stellan Skarsgård, Idris Elba, Christopher Eccleston, Adewale Akinnuoye-Agbaje, Kat Dennings, Ray Stevenson, Zachary Levi, Tadanobu Asano and Jaimie Alexander with Rene Russo and Anthony Hopkins as Odin, the film is set for release on November 8, 2013.