So since I couldn't find any other threads on this (which I'm thoroughly surprised), it seems that the 7th Sha is indeed finally revealed. On top of that, it seems that Emperor Shaohao is not dead, and even talks with us to warn about how he did not conquer the 7th Sha.
Sha of Pride Sound File
Now there was a lot of speculation that it was indeed the Sha of Pride, so good call guys. Although I didn't expect us to meet up with Shaohao. 5.3 is looking to be pretty damn explosive so far. Blizzard's approach to Storytelling and lore this expansion is far beyond my expectations, it really does give you a sense that you are in the middle of some intense happenings and that it's really about to hit the fan.