I’ve created a home brew Dark Sun 5e rule set. It’s minimalistic, and the races probably need a decent amount of tuning. Given that Wizards seems to have abandoned the mystic class, I think taking a different tactic - bringing Dark Sun to 5e instead of vice versa - is probably a better option. Along these lines, I’ve taken Sorcerer and created origins for it that make it into a mystic/psion class, starting with Psionic Casting at level one giving the class its iconic “hands free” manifesting. I’ve also created a Gladiator archetype for Fighter, to try and capture a warrior who is motivated by the audiences approval, and made several archetypes to turn the warlock into a templar, with each Sorcerer King being a different patron.
A big one IMHO are the archtypes for wizard. It’s really hard to have Dark Sun without having Preservers and Defilers.
Feedback, comments, and suggestions are welcome. It’s basically just a word document, so please forgive the lack of polish.