Natalie Portman Thor 2

Thor 2 is definitely coming and Marvel has release some information on what to expect from the sequel.
Natalie Portman Thor 2
Marvel president Kevin Feige told them (EW) that Thor 2 would “take Thor literally to other worlds,” and that the film will “primarily be the journey of that character, of he and Jane Foster (Natalie Portman) and how the new dynamic with his father (Odin, played by Anthony Hopkins) is working out, as well as what are the broader stakes for The Nine Worlds.”
Natalie Portman Thor 2
The Nine Worlds, for those unfamiliar with the particulars of Norse mythology or the simplified Marvel Universe version, include Midgard (Earth), Asgard and and Jotunheim, the realm of the Frost Giants. Those three worlds were seen in Thor. In total, the Nine Worlds are arranged on three dimentional planes like so:
Natalie Portman Thor 2
Top level: Asgard , Alfheim, Vanaheim
Natalie Portman Thor 2
Middle level: Midgard, Jotunheim, Nidavellir, Svartalfheim
Natalie Portman Thor 2
Lower level: Muspelheim and Niffleheim

So obviously there are a lot of places to go to and see in the Marvel universe. The first Thor just gave us a sample of the intergalactic possibilities. This movie is scheduled to come out one year after The Avengers (July 2013), so it makes sense that we’d have interplanetary adventures with Thor, rather than sticking to Earth. I’m looking forward to seeing where they go with this one!

Source : http://backseatcuddler.com/2011/09/26/thor-2-promises-more-intergalactic-action-and-more-natalie-portman/