That is what I am saying. The lore includes the sorcerer-kings doing experiments to become dragons. Dragonborn can come from earlier experiments. The Dray would also come from here.
The 2024 Goliath are more elemental, more genasi-like, and fit even better within Dark Sun.
As I said.
The Feywild makes sense as the lore about the Positive Material Plane, where there is sufficient Water to keep the elements in harmony. This harmony forms a Feywild. Eladrin are from here, but endangered. The few Positive areas are Fey Crossings.
Perhaps, High culture inhabits the Fey side of these Fey Crossings. Perhaps some Wood took refuge in a Fey area. If planet Athas lacks an Underdark with subterranean aquifers, perhaps the Drow inhabit the plane of elemental Earth.
In the context of Athas, the Elemental planes, as well as the Feywild and Shadowfell, are better understood as interconnecting local demiplanes. As the elemental Water dries up, its corresponding watery demiplanes vanish as well. The Plane of Water can entirely disappear, at least the areas corresponding to planet Athas. Relatedly, the Feywild likewise diminishes as the local areas of Positive elemental harmony vanish.
As the Negative Material Plane expands via increasing areas of defilement - destroyed elemental harmony - the Shadowfell likewise expands and intensifies. The Negative Material Plane is Shadow Crossings. "The Gray" is the Border Shadowfell that echoes local areas of Athas. "The Black" is the Deep Shadow where Domains of Dread can be found. Perhaps Shadarkai inhabit it.
Thematically, the Sorcerer-Kings are Shadow creatures. The Avangion are Fey creatures. Both are immigrants from the Material Plane.