Death and Warcraft's Expanding Cosmos

With the reveal of the Shadowlands, we've suddenly been introduced to a massively larger cosmos than the Warcraft universe had previously shown.

Warcraft sort of does and doesn't have an equivalent of D&D's "outer planes." Given how foundational D&D is to all fantasy RPGs, I think it's worth talking about regarding WoW.

In D&D, there are many outer planes which serve as the homes of gods and other fundamentally supernatural beings. Unlike, say, in Christian cosmology (or that of Diablo, actually), which basically has just heaven above and hell below, the D&D multiverse has 17 outer planes, each corresponding to different moral and ethical alignments (like Lawful Good or Chaotic Evil - or hybrids between, say, Chaotic Neutral and Chaotic Good.) This is before you get to "inner planes" which include the elemental planes or the Feywild and Shadowfell.

Prior to the reveal of Shadowlands, we'd known about the Void - which seems more the equivalent of the Far Realm in D&D, a place outside of even the Outer Planes that is utterly and incomprehensibly alien, filled with the kind of Lovecraftian monsters that are represented in WoW by the Old Gods. We've also got the Twisting Nether, though it's unclear whether that is so much an actual place with real locations or more of a realm of pure Fel energy (I've always wondered why the Shaman hearthstone-like ability Ancestral Recall says it takes you through the Twisting Nether - it's a space for Blizzard to expand lore if they want.)

The only time we've really spent exploring the Emerald Dream has been in the Emerald Nightmare raid. If the Dream and the Shadowlands are equivalents of one another, one would have to imagine that the Dream is much more multifaceted than what we've seen before. Indeed, the Shadowlands realm of Ardenweald is said to be more of the true other side of the Emerald Dream, making me wonder if there could be other parts of the Dream than what we know about.

What's curious to me, then, is also where the major players on the Warcraft cosmos fit into the Shadowlands.

The Shadowlands are a place of death - and this permeates it, even in the realms that seem far brighter and more benevolent. The Centurion constructs in Bastion are actually powered by death magic, despite the fact that that whole area feels bright and heroic. But what of beings that are tied to other primal forces?

I've wondered if Ny'alotha is just another one of the realms of the Shadowlands. Ilgynoth, after all, travels there after we slay him in the Nightmare, to become a boss in the new raid. But given how utterly alien the denizens of the Void are, would they truly be subject to the same laws that govern the living, being sent by the Arbiter to their appropriate afterlife?

The Titans seem to be fairly resilient in death - we did, after all, find their spirits long after Sargeras had killed his fellows. Were they being held by demonic magic from truly dying, or is that just part of the nature of a Titan?

We know that demons are reborn in the Twisting Nether if we kill them in our reality, but what about demons who are slain in their home realm? Is there a place in the Shadowlands that hosts their spirits, or are they too fundamentally different from mortals to actually wind up there?

I am glad to see Death as a force start to get fleshed out in the same way that the Fel and the Void have previously, but many questions remain as to how this all fits into the greater cosmic narrative of Warcraft.