The actor described the second film, which sees Alan Taylor take over the directing reigns from Kenneth Branagh, as "totally different" to the 2011 original, and compared it to the HBO series Game of Thrones.
"The look of the film is a lot bigger than what we did even previously," Hemsworth told Collider. "The first one worked and people loved it, but this is with a different director and just has a totally different feel.
"There's a definite Game of Thrones vibe thanks to Alan."
He went on to hint that Jane Porter's (Natalie Portman) absence from The Avengers will be the basis for much of the film's conflict.
"For Thor and Jane, there are some unanswered questions now, since obviously he didn't stop in and catch up with her in Avengers. Thor might have some explaining to do in this one… There's some fun to be had with that."
"Everybody upstairs in space is going to have an opinion on what happened over the course of Avengers," Hiddleston hinted.
"Thor and Loki were gone from Asgard for a time, and to all intents and purposes hell broke loose and they were both responsible, although obviously Loki was primarily responsible!"
> Chris Hemsworth picks up the hammer again for 'Thor 2': on-set pics
> Natalie Portman forced to return for 'Thor' sequel, says report
Watch Tom Hiddleston discussing Thor: The Dark World with Digital Spy below: