"It's a roller coaster, no question," Hiddleston said. "It's full of ups and downs and loop-de-loops and twists and turns. It will take you to places you haven't seen before."
Loki will have to team up with his brother to take on Malekith the Accursed, leader of the Dark Elves. "They have an ancient, ancient grudge against Asgard and against the reign of Odin, and they're back."
But Loki will remain a thorn in Thor's side. "Loki has a very complicated relationship with Thor," Hiddleston added. "He is an agent of chaos without equal in the world he inhabits. He knows his true nature. He knows he doesn't belong in the family of Asgard, and he's locked away in the beginning of the film in the deepest, darkest recesses of the dungeon as public enemy number one."
"I do feel like there's some unfinished business between Loki and the Hulk," he said. "I feel like he didn't get a fair fight. Who knows, you'll have to see what happens in 'The Dark World' to find out where Loki finishes up."
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