I am most looking forward to all the new 1-60 quests, especially all the lore involved in them. It will be great to see the new Westfall/Silverpine chains to see how they tie in with heroic Deadmines/SFK. I am also looking forward to seeing the Plaguelands change now that the scourge is gone. This will be amazing and fun to see these zones we have known for the past 5-6 years changed.
Good luck all!