Re: Thor's box office competition - Part 2
^ I think it's safe to say we will see one other world, though probably only one, and then maybe another if there is a third movie. There's really no need for more than that.
In the comics, Thor mostly operates on Earth and Asgard, and then in outer space for the cosmic stories. He doesn't actually spend that much time in the other realms, many of which have been pretty underused over the years.
I'd like to see Hel (and Hela), with Muspelheim and Surtur being the second choice that comes to mind.
For Cap, a Winter Soldier sequel seems pretty likely, with scenes in modern times as well as flashbacks, as in the comic.