[Tarrek]

Blizz has said that anything to do with pandas is likely a book. I seriously doubt it's the next expansion. I'd like to see another attack from the Burning Legeon. Maybe introduce demon hunters as a new hero class. I have a feeling we have a major old god expansion coming though.
Anyway, patch 4.3 is looking awefully decent considering the way cata has been going so far. 3 new caverns of time dungeons, the deathwing raid, transmogrifying, and a new look-for-raid finder with an easier difficulty as well as armor with set bonuses in the dungeons rather than just the tier gear.