I know it's already been speculated, but here are my top pics and reasons why.
Sha of Greed/Avarice:
-Could relate to Garrosh's insatiable desire to reap more resources in Pandaria and gain more power with the Divine Bell and flesh shaping new soldiers. Could also relate to the Mogu's insatiable desire to rule all of Pandaria again and turn it into a police-state like it once was.
Sha of Deceit/Deception/Lies/Paranoia:
-Could be a Sha that has been working under the radar to influence different groups to do different things such as 1) the Horde and Alliance's increased hostility and all out war, spurring the reemergence of the different Sha. 2) The Mogu and Zandalari actively practicing spirit binding that could potentially be used to the advantage of the Sha to combine themselves into one being again (Y'Shaarj).
Sha of Chaos/Turmoil/Discord/Disorder/Pandemonium:
-This is a common characteristic of the Old Gods in general and is the anti-thesis of order and life (brought about by the Titan created waters of the Vale, speculated to be the actual "blood" of a Titan itself.) Pandaria represents the balance between the two.
Sha of Pain/Anguish/Sorrow:
-KIND OF similar to despair, but different enough that I wanted to throw it out there. War ultimately brings about pain and suffering in the end so... Yeah.
Sha of Arrogance/Conceit/Hubris:
-Could relate to 1) Garrosh's attitude about Horde dominance and how that affects his campaign in Pandaria. 2) It could also relate to God King Rastakhan's arrogance/hubris with not heeding to Prophet Zul's warnings about the cataclysm. He was skeptical to begin with, but felt that if such a thing WERE to occur, Zandalar would survive just as it's magics helped it survive the Sundering long ago. 3) Could also relate to the Mogu feeling that it is their right to be the true rulers of Pandaria.