as you can see, the user “Manaberry” has posted some pictures concerning the design of the next regions of the so called “Broken Isles”. 188 screenshots are quite a lot but only some screenshots are worth mentioning, in my opinion.
And these are the following ones:
Further more, there is a new video about the area beneath Karazhan, made by MMO-Champion:
Source (Picture): Blizzard Entertainment