Here we could use a house rule, something like the variant classes from 3.5 Unearthed Arcana or the "archetypes" from Pathfinder. Then a divine or primal sorcerer is possible in your tabletop if you want.
In my tabletop divine and primal are different power sources.
Other point is if "ki" and psionic can work as the same or different power sources. This is important because if after the psionic powers the next step will be a remake of the martial adepts (3.5 Tome of Battle: Book of nine Swords). And then WotC should explain if the martial adepts should be allowed in Athas or not. Or the totemist shaman (incarnum soulmelder). Maybe in Athas some kaiju creatures are worshipped as deities by some Lovecraftian cults/tribes.
Let's remember the last construct races, warforged, autognomes and future glitchlings don't need neither water nor food, and that in Dark Sun it is practically broken, because the survival is one of the hardest challenges.
My theory is they will bet for a spin-off of Dark Sun, because this allows the mixture from different elements (for example the new PC races from the 3.5 psionic handbook). Practically it would be all the crunch, but the original lore totally untouched.
WotC has to choose the future plans about the metaplot. Aren't canon the novels any more?
* What if players want to add to their Dark-Sun game new elements from 3PPs?
* Who would win in a war, the sorcerer-kings or Cobra (the archienemies of G.I.Joe)?