Last stretch! On the Earths themselves, anyway. Let's try to figure out what's out there.
Always bugs me that the "52" ends at 51 (because there's a 0), but whatever. We haven't nailed everything down, and I'd have hoped for a world where the Smallville digital comic takes place, or Ame-Comi girls, or Batman '66... I find these continuities more refreshing reinventions of the DC Universe than what the New 52 came up with. I'd also be surprised if Flashpoint-Earth didn't exist somewhere. Maybe they're worlds I couldn't properly identify, or I can just choose to believe they are these "unknowns" in red. The fact that Crisis elements are being used in Smallville may mean it's entirely unconnected to THIS Multiverse, which would be too bad.
Next: What else is out there?