Re: Which realms do you want to see in Thor 3?
A conversation in The Dark World has really made me interested to see what they would do with Niflheim and Hela.
Muspelheim is an obvious pick given what most of us think the story will be.
The forges of Nidavellir could probably be done in a cool way with the mix of fantasy and sci fi that TDW featured. As long as it's not shown for something so dumb as making an ugly replica of Mjolnir.
Of course it would be nice in theory to see all the realms but I doubt they can give much time to more than a few within the timespan of a movie.