Like how DS has these sound files:
Alexstrasza says: They have failed us sister.
Ysera says: I have awakened only to sleep once again.
Which are just in place to go off when a raid wipes and Ultraxion kills the aspects.
I honestly don't think these supposed Lor'themar voice files are Lor'themar at all.
The voice is similar to Lor'themar's, but not as gravely and low-pitched. He also says several things, such as "I'll never get all this dust out of my robes!" and "I'm summoning a Flamestrike!" which.. do not fit for Lor'themar, as he neither wears robes, nor has the ability to summon a flamestrike - whereas Aethas and Rommath both do. It would make more sense if it was either Aethas or Rommath.
Between the two of them, only Rommath would have the audacity to threaten Sylvanas to her face and taunt her, whereas Aethas takes a more quiet, meek approach. These audio files also seem fairly egotistical - another trait that Rommath has.
Also, just to bring it up, does it seem like Garrosh... again... drops the corrupted gorehowl? So he won't have it in the final fight.. whats up with that?
I'm sure Thrall and Garrosh will 1v1, finishing their original fight. Thing is, will Thrall pull a Grom and sacrifice himself to save "The new Horde"? Seems like something Blizzard would do... if they wanted to get rid of Thrall. But Thrall's little "If I don't make it Vol'jin, take care of Aggra" screams he's going to live. I've only seen that said as a device to add tension if a character will die or not, then come out victorious.
Zhu Li, do the thing!
I dont want this raid to be alliance and horde leaders holding hands until we get to Garrosh, only to see Thrall take him out. I'd like to see night elves too, but that's just me. We deserve something good after Cataclysm and both Alliance and Horde have had terrible lore this Expac up until this point, so this raid better be good.
In the fell clutch of circumstance
I have not winced nor cried aloud.
Under the bludgeonings of chance
My head is bloody, but unbowed.
These 'deaths' in the sound files sound more like an event where you have to protect them, and this plays if you fail. Think of Jaina/Thrall in Mount Hyjal.