No, not the nebulous plot of Lathander in the Realms!
So Athas has a different cosmology from the rest of the D&D settings. We have the Grey dampening ethereal and astral travel. We have the Black, the plane of Shadow analogue. Then we have the Paraelemental Planes that diverge from the core cosmology (no Ooze, Smoke or Ice).
I was thinking, could there have been a cataclsym at the dawn of Athas’ existence that led to this? Maybe even something that led to the Blue Age in the first place?
What if an Elemental Prince/Power attempted to maximise their own plane at the expense of the others? Or ancient divinities hatched some plot of ultimate power? Only things went terribly wrong.
The plane of Ooze dessicated into silt. Fire burnt purer and Smoke collided with the Quasielemental Plane of Radiance, creating Sun. The aftershock of Sun’s creation melted Ice into Rain.
The Plane of Shadow was damaged and became the Black and the Grey resulted from the planar environmental aftershocks.
You could even have Rain or Water having a near miss with the Prime Material and flooding Athas into the Blue Age.
Just something I’ve been thinking about when I should have been working