Amongst those listed as part of the Dark World cast, London-born Adewale Akinnuoye-Agbaje, who has appeared in The Bourne Identity and 2011s The Thing (and will appear in Sylvester Stallones upcoming Bullet to the Head), has been announced to play Algrim, a Dark Elf who, in battle with Thor, is dropped into a molten pit, re-emerging as the demonic Kurse, and hell-bent on exacting his revenge. The character also has some history with Malekith the Accursed...
7. Malekith the Accursed
Former Doctor Who star Christopher Ecclestone appears in The Dark World as Malekith, the leader of the Dark Elves of Svartalfheim, who covets the Casket of Ancient Winters (which we see in the first Thor). This could provide the main plot of the film that features a huge role from Tom Hiddlestones Loki. In the comics, Malekith in unleashed by the King of the Fire Giants, Surtur, which could suggest we may see more from the nine realms...