I'm really interested in seeing how Blizzard develops the Revealation of the New Warchief. I'm sure it will be some kind of cinematic after killing Garrosh or something to clear the smoke that has been these discussions for several months on the forums. I have to say though that in my opinion and many others, the way Voljin's story has developed this expansion has me set that he will be the new leader of the Horde. Thrall is close to Vol'jin and Thrall would not want to make the same mistake as bringing in someone who could be potentially like Garrosh in the future. Vol'jin's role has been so intriguing this expansion that it would honestly be kind of a "downer" moment (just my thoughts) if he does not get the right of Warchief after this. Lo'Themar is a cool character as well, but I feel it wouldn't fit into the story as well as what Vol'jin can be to the Revolution of the New Horde man'!