If I am not mistaken, this is pro-Cataclysm (AFTER Cataclysm). So, Deathwing was "killed" by a group of level 84 noobs. Note the quotations; unless these newbies brought Deathwing's head back from thier victory like they do with Onyxia, I virtually GUARANTEE that Deathwing is still alive. Perhaps it was impossible to bring his head; his neck is encased in adamantium, or anyone attempting to do so gets melted under a flow of acidic blood that Deathwing so convineintly has. So, by this logic Deathwing is still alive, and perhaps well enough to gather the remainder of his flight (but I doubt that he will ather more than five or so). Because the Blacks have now undergone not one (War of the Ancients), but TWO mass genocides (Cataclysm), I doubt the Black dragonflight will survive this. Perhaps they intermingle with Chromatic and/or Nether drakes, but they are out of the fight for a very long time, if not forever. If Sargeras is actually destroyed, then there will be this much chance for Deathwing and the shreds of his race left: JACK SHIT. He isn't coming back in this campaign any time soon, unless you want him too.
If the Titans decide to come and cleanse this particular planet of imperfect mortals, we are completely screwed. We will be able to do nothing against them; imagine five level 80 WoW players cutting through about 100 brand-new level 1 people. They should stay away from this campaign, because if they DO come, and we are somehow able to defeat them (showing them we are worthy of survival is another thing), that would be the most ridiculous and insensible thing ever done and would blow a huge hole in the quality of your map.
As to the Silithid, they are one of my favorite WoW races because I am a sucker for insects, so I have plenty of ideas for your Silithid race. I don't know how close the Silithid are to completion, but there are plenty of ideas in my head for you to exploit.
As you already know, the Twilight Hammer clan is just another Orc clan. What makes them important enough to appear in your map? They were nearly wiped out in the Second War, and even today have absolutely nothing when compared to the Horde. The Silithid represent the Old Gods, but why is the Twilight's Hammer clan here?
As for Nozdormu returning with the Infinite dragonflight, that sounds like a good idea for a last-minute, desperate action that could, say, turn the tide against an unstoppable wave of Silithid crushing much of the mortal resistance ahead of them. Ysera falling to the "Emerald Nightmare" sounds a bit far-fetched; isn't Ysera herself master of the Dream? By now, I think the Blue dragonflight would be beaten into submission by the other Dragonflights and would therefore play a minor, if any, role in the pro-Cataclysm world.
wow, your lore is very lacking
1. 85*, not level 84.
Also, Deathwing's body was dragged and thrown into the Ocean after his slaying, which lore-wisely, was with thousands of soldiers and almost every single leader of Azeroth.
2. we already defeated the TItans once in Ulduar, we can easily do it again, they're not as almighty as we think. The Pantheon, which is the council of the most powerful titans, could easily rip us to shreds, but they have more important things to do.
3. i'll be happy to see your ideas on the silithid!
4. actually, the twilight's hammer clan was an OGRE clan with some orcs, and you really underestimated them. I'm guessing you never read their lore, they are EXTREMELY important.
1. they're probably the largest clan in the world, present-day they have atleast one of all the sentient races.
2. They are worshippers of the Old Gods and obviously try to summon them MULTIPLE times.
3. They are blessed by the old gods, making them powerful spellcasters and also mutating them into lumbering war beasts.
4. they're just badass
5. The Blue Dragonflight will most likely come back as Frost Wyrms, though their remaining sane members might follow their leader, IF i decide to allow Malygos to be a frost wyrm, to the Scourge.
And yes, Ysera becoming part of the emerald nightmare is far-fetched.
Also, it is rumored Nozdormu is indeed the LEADER of the Infinite Dragonflight due to a quest in WoW, in which you use a device which will find the leader of the infite Dragonflight, an image of Nozdormu ends up appearing.
thanks for the comment, +rep!