Originally Posted by JB-the-Hunter
Malekith being the main villain doesn't exclude Amora and Skruge just as Loki being the main villain didn't exclude Laufey or The Destroyer in the first movie.
Don't know why people keep thinking this is an either-or villain/battle. Feige has already said it takes place in *multiple* worlds, and Malekith is just one of many villains Thor will likely run into. I fully believe this will be a grand tour of (at least part of) The Nine Realms, and a showcase of Thor's classic (non-terrestrial) villains.