Indeed, Hiddleston rejoins the Marvel Cinematic Universe as soon as November's "Thor: The Dark World," a project the actor describes as "a sequel to 'Avengers' as much as it is to 'Thor.'" (You can see an exclusive trailer cutdown for "Thor: The Dark World below.)
"It's a roller coaster, no question," Hiddleston told MTV News during our recent Fall Movie Preview interview. "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."
In the upcoming "Thor" sequel, the titular God of Thunder brings his hammer to bear upon Malekith the Accursed, leader of a forgotten foe known as the Dark Elves. "They have an ancient, ancient grudge against Asgard and against the reign of Odin, and they're back," Hiddleston described of the "massive and threatening" enemies facing Thor this time around.
But never count Loki out of the fight. Even as most eyes are turned toward Malekith, Hiddleston's very own mischief-maker remains a thorn in his brother's side.
"Loki has a very complicated relationship with Thor," Hiddleston said of his role in the film. "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."
It's not long before foe becomes friend, however, as Thor and Loki are forced to forge an unlikely alliance against Malekith. "Lo and behold, Asgard needs his help," the actor teased. "That's going to be a very complicated allegiance."
Beyond "The Dark World," Loki's place in the Marvel Universe is murky. Joss Whedon has confirmed that the villain isn't part of his planned "Avengers" sequel, leaving many fans wondering where they'll get their Loki fix after November. Hiddleston's lips are sealed regarding the character's future, except to say there's still one score he hopes to settle.
"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."
Whether Loki gets another chance at a "fair fight" remains to be seen. "Who knows," he said. "You'll have to see what happens in 'The Dark World' to find out where Loki finishes up."
Check out everything we've got on "Thor: The Dark World."
From "Romeo and Juliet" to "Ender's Game," "Riddick" to "Oldboy," the MTV Movies team is delving into the hottest upcoming flicks in our 2013 Fall Movie Preview. Check back daily for exclusive clips, photos and interviews with the films' biggest stars.