Chaosmancer
Legend
You can get it wrong a seventh time you like. It does not list the PLANES of the Great Wheel. It lists only the NAMES the Great Wheel uses for the planes that exist for all cosmologies.
The Great Wheel calls it Ysgard, The World Tree calls it Asgard, and The World Axis has a different name for it. The plane is the same for all three.
Let's see here... to quote the FR Wiki which covers multiple different editions of material, "The Heroic Domains of Ysgard,[12] also referred to as Gladsheim,[13] was the Great Wheel plane straddling the alignments of chaotic good and chaotic neutral."
Then is goes on "Some characteristics of this plane were ascribed to the World Tree cosmology planes of Arvandor,[15] Brightwater,[16] Gates of the Moon,[17] and Jotunheim[18] when that cosmology model became popular."
Huh, that's weird. It doesn't say that the World Tree called it Asgard, it says that the World Tree "ascribed the characteristics" (Which, by the way, implies these places weren't real planes, but just a misunderstanding of Ysgard) to four other planes of existence. Arvandor, Brightwater, The Gates of the Moon, and Jotunheim.
But, surely Asgard or Ysgard appear in the World Axis, right? Oh, wait... no. They don't. Arvandor does, Gates of the Moon does, but that's it.
And let us see what the 5e DMG says. On page 61 we get Ysgard. Arvandor doesn't exist, Brightwater doesn't exist, Gates of the Moon doesn't exist, Jotunheim doesn't exist.
So, let's make this a little cleaner and play a game. Here are the three models
Great Wheel: There is the plane of Ysgard, that is between Chaotic Good and Chaotic Neutral
World Tree: There are multiple planes, Arvandor, Brightwater, The Gates of the Moon, and Jotunheim attached to the Tree as various roots and branches
World Axis: There is the Astral Domain of Arvandor and the Astral Domain of The Gates of the Moon, they are unrelated.
And here is 5e's version. Ysgard, Alignment CG, CN
Which one of these does it look like? Does it look like all of them, or does it look exactly like one of them? And if the plane is the exact same for all of them, even though for two of the models, the plane doesn't exist and is actually many seperate places with entirely different rolls and feels... doesn't that mean that one model is true and the others aren't?
The bolded is not supported by the 5e DMG and is actually refuted by the 5e DMG. You seem to be going by older editions with that claim.
And that is because the 5e DMG uses the Great Wheel and does not present the other models. Thank you for proving my point, yet again. Now, can you just admit it?
Actually I do. I'm not arguing that it's a good thing. I'm simply telling you what the 5e DMG says. Were I ever to run Eberron(and I don't think I ever will), I'd use the 3e lore and cosmology, not the 5e one.
I know what the 5e DMG says. I am not ignorant of the problem I am pointing out. That's why I can point it out.