Originally Posted by
Bladesyphon
Not to sound like a jerk, but your understanding of the Lore is incredibly poor. Pretty much everything you've typed in regards to Sargeras, the Pantheon, and the Void Lords is wrong.
Let's start with the Void Lords, and why they seek a Void Titan. As the other poster said - if Sargeras did not destroy the nascent Titan that was consumed by the Old God parasties, it would have created a Void Titan, and that would have spelled our doom. That is because the Void Titans are little more than a gate way device to be used by the Void Lords to usher in their coming. Once in our dimension, the Void Lords would spread over all existence like a wave, consuming all matter until literally nothing is left in their wake. This leads us to our second point of contention in your understanding of the lore - Sargeras and his reasons for forming the Burning Crusade.
Sargeras never fell to insanity or corruption, he simply was devoted to his grim duty. He DID go to the other Pantheon members originally when he discovered the Void-consumed World Soul, and pleaded for their help. The Pantheon, however, shunned him aside saying that he was a fool for believing the Void to be stronger than they were, and even worst for killing a nascent Titan. The Titan's had no understanding of the Void (and still do not), they arrogantly thought they could have purified the Titan, and in doing so, could have risked the entirety of creation.
Sargeras formed the Burning Legion out of the necessity of sparing the Universe from utter annihilation by essentially burning it and letting it re-grow, believing that the Universe started from nothing, it could do so again. His ideology was that the Void Lords needed a Void Titan to usher in their coming, and if there were literally no Titans left in the Great Dark Beyond, then the Void Lords could never enter our realm, and the universe would be spared utter annihilation. His methodology might not have been the most morally righteous one, but in the face of a foe he knew could not be stopped in any other way, this was the only direction he saw possible.
Next - we did not defeat Sargeras, not in any sense of the word. Sargeras is in a league all of his own, and we would have never stood a chance against him without some serious deus ex machina plot device to get us there. Even the battle against Argus was barely a victory - and it was considerably weaker compared to Sargeras. Remember, what we fought of Argus was it's avatar, similar to what we fought of Aggramar right before hand. We did not fight Argus in his pure Titan form, and it's arguable that Argus was in a severely weakened state when Sargeras transferred his soul into his avatar. Let's also not forget that Argus killed us during the raid as well without breaking a sweat - and it took Eonar and the other Titans to bring us back and give us a fighting chance.
Then, when all was said and done, the Titans had to use the last of their power to bind Sargeras to his seat on the Pantheon, and even then they still needed Illidan to serve as his Jailor to ensure that the Titan wouldn't break free. That's barely a victory in any sense of the word.
Lastly, on the subject of there potentially being more than one Titan out there - there isn't. This doesn't just come from the fact that the Titans themselves seem to be aware of the fact that Azeroth is the last Titan, but it also comes from the Illidan book, where a scene depicts Magtheridon discussing the Legion's progress in cleansing the Great Dark Beyond, stating that there are only a handful of worlds that still remain, Azeroth being one of them. By the time Legion takes place, nearly every single planet in the Great Dark Beyond has been destroyed by the Legion. Azeroth is one of the absolute last hold outs of life in the universe, which is why Sargeras went through such great lengths to claim it. Azeroth was his end-game, and had he managed to destroy the World Soul, or turn it into his Dark Titan, or really do whatever he had wanted, he would have succeeded in protecting the Universe from Azeroth.
So in summary: If Sargeras never created his Burning Crusade or destroyed the Nascent Titan - WoW simply would not exit. The Void Lords would have arrived, consumed the universe, and the story would have ended there. It would have been the very definition of a Bad End.