I do agree with the possibility of Grizzlehiem, but I'm not sure that they are going to have Polaris even though there are snacks and story elements hinting to it, however I do believe that they will have Krokotopia since they say stich which could mean bandages which could mean mummies which, finally, could mean Krokotopia also in Aquila, if you are Witchdoctor, after defeating the quest Hello, Walls you get a Sphinx staff which could be possible Krokotopia reference