You just made me realize something weird.
At the present moment we are dealing with a bunch of alternate versions of Superman who are fighting to become the "official" one. Right?
So... Haven't we already seen something similar?
http://static5.comicvine.com/uploads...1-superman.jpg
http://3.bp.blogspot.com/-t_hG9FPigq...0/Reign518.jpg
At the end of the Jurgens era, there were at least two or three crossovers which focused on alternate versions of Superman in the same continuity. In at least one of those occasions the main villain was Dominus (a completely forgotten character - many people hated him but I still like the design a lot, it's weird and surreal) and in another one some kind of alien telepath named Cogito (I never read that story, though).
The weird thing is that that period was the last straw before the end of the Jurgens era. The super Morrison/Waid/Millar/Peyer team should have followed, but everything fell apart and we had the Loeb/Kelly run (which I still like a lot, it was full of good ideas for the most part even if they weren't implemented successfully).
Somehow, I got the impression that we just went back to the past.