This is a very loose theory, based on really just basic visual cues and based on how the storytelling of Wow is moving towards a line of “maybe the titans have been lying”.
I don’t have a shred of doubt that there is a Worldsoul inside of Azeroth, and that said soul is talking now with Anduin and Thrall and the others, well, maybe I do have some doubts, but I’m most certainly this isn’t a bait.
The Nature of Azeroth herself is what bugs me. First, let me say this, I know cinematic trailers are not the same as in game content, but cinematics have been mostly consistent visually with in game stuff.
In the War within cinematic, we see something that represents the world soul of azeroth, calling for Anduin and Thrall, and the image we get is something similar to a Sun, or a ball of Light, in the gold and blue hues we see in Azerite. Now this could be just artistic freedom, but that isn’t how Titan souls look like, titan souls look like constellations, we see that clear in the Antorus raid, all titan souls we see have this same visual style. Again, this is a very minor thing and it is most likely nothing, but I was already thinking Azeroth could be something else and not a Titan, and this led me to some curious thoughts.
Starting with Magni, the speaker, we know Magni has been talking with what he believes to be the world soul of azeroth, and we also know he could hear the world souls of other titans, but here is the thing, Magni is dwarf that was changed into the role of Speaker, which also changed his structure back to stone (crystal), so he is basically an earthen, a Titan construct, what If he speaking not with Azeroth, but something keeping an eye on Azeroth, maybe a Keeper? And now the real Azeroth is calling for help, and Magni as a speaker will contradict in some fashion what others are hearing, imagine so.
The other piece of the puzzle to me is how lore has been constant on showing us that if you take a thing, and juice it up with another thing enough, it will become the second thing.
A titan juiced with death energies went to the shadowlands, a Naaru can lose its light and become void, or can even become part of death if infused with death energies, Eredar and Nathrezim became demons after juicing on fel and so on.
So here is the theory.
The whole chronicles part of void lords sending old gods to corrupt worldsouls is probably true, and the Titans being in the cosmos searching for other titans, probably true as well, but when both reach Azeroth, they realize this isn’t a titan, this is something more, and the Titans fight the black empire and stop the old gods from corrupting it, great, now with the space free, the Titans can work towards converting whatever Azeroth is into a being of Order, a Titan. My idea is that Azeroth isn’t a Titan, but the pantheon wants to make her one.