Don't keep track of other Blizz games, but one for sure since todays news with the hippogryph reward mount, I say:
- New WoW expansion (well, duh! It's about damn time we get some info).
- Annual pass with beta access and the hippogryph mount.
The hippogryph mount to me points towards night elves which in it self point towards Burning Legion to me. Also the news that Metzen confirmed Turalyon and Aleria will be back almost makes this unquestionable.