Guess the next Old God for Azeroth?

I found this thread on the official forums: Guess the next Old God from Cthulhu mythos?

Currently Cthulhu/C’thun and Yog-Sothoth/Yog-Saron have had callouts in the game. But who might be next?

We were discussing this last night (as we wiped again on General Vezax in 10 man). Opinions were split between fan favourite, The King in Yellow — *coff*Hastur*coff*, my favourite, Nyarlahotep, or my husband who thinks that the Shub-Niggurath (the goat with a thousand young) would make a cool raid encounter.

What do you think? And as an aside, why haven’t we had the Hounds of Tindalos in an encounter yet? Beware the corners ….