Seeing as how the old gods make their move in Cataclysm it is that time agian, a new old god speculation thread.
The old gods are almighty, they could not even be bested by the titans, only imprisoned, and they want out! Everything we have seen of the old gods up until now is all part of their plan to free themselves from the grasp of the titan prisons. C'thun was the first to be liberated. After a devestating war and long imprisonment the mortal races of Azeroth thought that they could best the old god and its armies. And they 'did', or at least that is what we are meant to believe. Let us assume that much of the old god lore is indeed based on Lovecraftian Cthulu mythology, C'thun might be dead, or as we might see dead, but old gods do not live and they do not die, he is still dreaming, able to corrupt so he can amass a following so he is resurrected into this world. With C'thun liberated and defeated (still bound by his titan prison I believe, but the gates of Ahn'Qiraj are opened), phase one of the return of the old gods is complete.
Phase two begins, Yogg-Saron corrupted the lich-king long before the third war began. Some of his corrupting powers come directly from him ("Blizzard representatives have stated that they feel the connection between Yogg-Saron and the Lich King ended up being poorly expressed in-game,[9] but added that it "had a lot to do with the ability for mortals to become corrupted."[10]"). Yogg-saron sends the forces of the lich-king to battle so he can lure the alliance and the horde to him and his goals. With this distraction C'thun is making his return to this world ("While the Lich King attacked Stormwind City and Orgrimmar and King Varian Wrynn and Warchief Thrall were distracted, Cho'gall began the resurrection of his new master - the Old God C'Thun. This deformed the ogre's body which became monstrous and with similar features to his master's."). With the other old god returning into this world, free of the shackles that held him so long, phase two is well under way. Yogg-Saron lures the brave adventurors into Ulduar so they can finish of the maddened titan guards and stop the only thing that can stop their plans, Algalon the observer. The only thing the old gods have to fear is titans destroying the planet they are embedded in. The titans might not have deemed it necessary in the past, they will surely not make that mistake twice. Thus with the only means of getting backup destroyed, and the second old god liberated (no more titan jailors to deal with, no more threat of 're-originasation') (and killed in the same manner as C'thun), the stage is set for phase three.
With one of their most powerful minions (Deathwing) wreaking havoc on the world of Azeroth and the mortal races left in a terrible war (which was started by the lich-king (and thus by Yogg-Saron) at the roof of the world) the twilight cult has the oppertunity to start summoning in some reinforcements, old generals are making their return (Ragnaros and Faceless ones buried everywhere). At least five years have passed before the cataclysm hits Azeroth giving the twilight cult ample time to start the resurrection of the God of Death, Yogg-Saron, to make his glorious return into this world, ready to wreak havoc with the other old gods and consume the world of Azeroth.
But that is not all, as we could see, the old gods have influenced all of the major events in the history of Azeroth, they corrupted Neltharion and made the Demon Soul, they are responsible for the assassination of the king of Stormwind, they are responsible for the appointment of Bolvar as the new lich-king. Every event in the history of Azeroth is shaped by the old Gods, and they are nearing their goals if you look at the shear size of the twilight cults activities in days to come. This is the hour of the old gods, this is the time that the dreaming gods will take their rightful place as rulers of Azeroth!
See that the end is finaly upon us, don your purple robes and cheer for the coming storm. Revel in the choas, the death and all the destruction that will herald the beginning of the final dusk! Bow down before the true gods of Azeroth!
[b]U'ulmu ithisarag gagera'gog wussssh!