The entire Fourth World.
With Darkseid making his 'debut' in JLA, does this mean that the Fourth World is being rebooted entirely (like Superman), or the fact that since JLA was set five years in the past, and we're now in the present-day mean that it's only a partial reboot (like Batman).
In any event I'd like to know what the deal is with Orion, Scott Free, Barda, Kalibak, etc.
The Fourth World has been one of the most interesting aspects of the DCU for me through the years.
I wouldn't say entirely rebooted... certainly rooted in some of its past elements. Several members of the Apokolips community have made minor appearances, but as yet none from New Genesis. Recent mention in the Superman title inferred that the status of New Genesis and Apokolips may soon be resolved...
Anyone else still missing? I'm going to update my list with these additions later tonight...