So after defeating Kil'Jaeden above Argus in Tomb Of Sargeras raid, he start whining how he was jealous about Velen. Then Illidan did the most retarded thing, what ever happend in Warcraft story. Well if we forget few other things but nvm...

So Illidan used Sargerite Keystone, to bring out from twisting nether Argus and bring it to proximity of Azeroth. The point is he is succed, but results might be bad?

Ok there is many theories what may happend, let's sum it up.

1: Sargeras is an Argus. This sounds possible, since he may heal his wounds from inhabating Medivh and dead body of his avatar he got.

2: Sargeras was an Argus. This sounds stupid like, Sargeras awakened, then left planet and later came back to corrupt Eredar into Legion ranks?

Also there is lately rumors about Lich King, that somehow he loose control on himself and might do same shit or even worse, like Arthas did. This sounds logical, due to aggrement with Knights Of The Ebon Blade, and sending Deathlord(Player) to rise an undead dragon as DK class mount.

All of this sounds interesing, also in fact that our destiny lies in Argus. Im pretty sure, that final legion boss will be Sargeras, but problem is... Why he want Azeroth? Azeroth is currently dormant titan, so corrupt it or what?

And what is naga role in Legion? For all i noticed, they are look for Tidestone Of Golganeth, but for what purpose? Finally break free N'Zoth from his prison, which is allready weakened?