I haven't read the thread apart from the first post announcing this news, but as a huge Dark Sun fan, I cannot help but feel saddened it is being revived in 4E, which I am not a fan of at all. The reason I care one way or another with respect to what settings make it to 4E is that once 5E or 6E comes along and I might start playing the current edition again, these settings will have been ruined forever by Realms* Shattering Events (*replace 'Realms' by the appropriate setting name) and various retcons to fit the settings into the 4E mold, as was done with Forgotten Realms. With Realms it was hard to swallow, but it will be worse now, because now it is the turn of my favorite official campaign setting to be butchered.
Might want to read this before jumping to conclusions there, mate.