Dark Sun had an mmo long time ago and had two games adapted into CRPG's by the glorious but dead SSI(Strategic simulations Inc.). I sadly never played Dark Sun Online : Crimson Sands but loved Dark Sun : Shattered Lands and Dark Sun : Wake of the Ravager. So, here is a suggestion from DDO - Dark Sun expansion content if this expansion ever comes.
The expansion could be a lv 14~16 expansion with versions of the quest for legendary levels.
- NEW CLASS : Psionicist - I know that it would take too much effort to implement, but psionic powers are rarely available in video games and are a huge part of Athas.
- NEW CLASS : Gladiator
- NEW RACES : Mul(half dwarf) and Half Giant.
- NEW FACTION : Veiled alliance, rebels, psionics academy, arena
- PLACES : Tyr city, Tyr zigguratt, tyr mine, underdark,
- RAIDS : Raid the Kalaak palace and kill kalaak. Protect the new free city from the wrath of Borys, the level 30 defiler/lv 30 psion sorcerer king.
Some content which would be cool from a quick brainstorming for a hypothetical expansion set in Athas.