Well we have had "space" stuff in TBC, we had nordic in northrend, we had a going back and waterworld, center of the earth thing in Cata, we had Asian in Panda world, dont know what to call it in dreanor, maybe history stuff and finally we have a little mix of them all except Asian and center of the earth thing in this one, which is more going on addicted elves and space stuff.
So the next great threat against everything is maybe the creator himself, since we are about to have killed all the titans or at least there is not many left, even the gods we have battled and won against.
So yeah, maybe kubrat is right, next thing will be a pirates with sea battles and controlled ships or maybe more space stuff with an odd blend in.
