Hi, I have run 2e and 4e dark sun a lot and while I would like to continue to do so in 5e I think I will hold off for a bit, mostly because at this point psionics would be completely homebrew or reskinned wizard, neither of which seems very satisfying.
I agree that all this will be easier with the DMG, for encounter building advise if nothing else. After that it's a question of do I want to put a lot of work into it or wait and let someone else do it.