In Before the Announcements

So before Blizz decides to mention what the next expansion is going to be about, i want to get my guess in.
1. The infinite dragonflight and Nozdormu. 
2. Panderen Monks (no, not Panda-like people, but actual humans-like nation in some continent on the other side of Azeroth called Pandera).

Since we'll finally get to meet Azhara in the upcoming dungeons, although only for a short time, we do see how she can be a target for the new expansion.  However, i think we'll have to deal with Nozdormu first.  His dragonflight has been with us for the past three expansions, making us fight in different times just to keep the timelines in-tact.  i think this is a more involved story if we end up fighting their corrupted form, the infinite dragonflight. i am sure Noz may try to no more damage in the timelines and we're supposed to correct them before, finally, meeting Noz's dark form. 

The panderens, they're monks, they love rice wine, they are kung fu masters.  i doubt this will be the next expansion but a lot of people seem to think it is.