Actor Tom Hiddleston spoke with Empire about his role as Loki in Thor, The Avengers, and the upcoming Thor 2. According to Hiddleston, shooting on the Thor sequel is scheduled to begin soon:

... without revealing too much, there's a specific skill set you need to be Loki's army - let me know if you have the qualifications. And all I know about Thor 2 is that we're supposed to film it in London in the summer and that it's being directed by Alan Taylor.