Traditionally the Blizzcon pet has been a murloc. I personally think it'll be an infested Murloc, to go with Heart of the Swarm.
Idk, maybe something to do with their next IP? Its hard for me to think that they'll do something for SC2 when HotS comes out in a month, and blizzcon is generally 2nd half of the year. Never know though could be wrong in the end.
However, they really don't have anything being released for this holiday year (that we know of, at least...). I've got a sneaky suspicion it will be another Diablo-based related pet, just to try to encourage players back to that game.
EDIT: Or possibly a Murloc dressed up as Garrosh Hellscream. I'd imagine the final patch of Pandaria would be around that particular timeframe.
Or they could surprise us with a new expansion for release THIS YEAR. :P But I'd highly doubt it - not to mention I don't want FULL expansions rushed out so fast. If it was half-sized content at half the price though? It would be more acceptable.
Wouldn't mind a sha themed murloc
I'm sure they'll have something "new" to announce, I mean they didn't do any Blizzcon last year, so I doubt they would make this one uneventful. Whatever it is that will constitute their big reveal of the show is what the pet will be modeled after imo. So ya, probably not Hos.
---------- Post added 2013-02-12 at 02:01 PM ----------
I just hope it's not fail pet, I want to make a super awesome murloc team and I'm missing one decent murloc.
Murloc with Wings, horns and glaives
Perhaps a sha infested murloc. The Shaloc.
when all else fails, read the STICKIES.