This never really was an Oz story, though. What we do know is that Superman was split apart, we pretty much know who did it, we found out who the fake Clark was and why, and we saw Superman get merged.
So now instead of having two Supermen, we have one. We don't have a Frankenstein continuity, we have a 5th Superman. And yet, instead of being the 5th version of Superman, it's actually Superman version 3. Post crisis and New 52 effectively become version 3A and 3B. We've also had Crisis erased, so we have a clear link to the pre-crisis Superman on the table.