Why? Those 2 universes merged to become part of Earth 0, but Earth 50 isn't the Wildstorm universe anymore, it's the Justice Lords universe and Earth 13 is now the League of Shadows universe rather than the Vertigo universe. It seems clear some universes merged while others were created as a result of Flashpoint given those universes still exist but not as they had before. That would also explain any contradictions with any other universe.
Based on "Flashpoint" #5, I would have thought that there would simply be no E13 or E50. (I have no problem with the Justice Lords, provided DC does *something* with them. But, for all the hype DC gives their multiverse, they do not use it much outside of over-hyped fight books.)
Most sensible thing I can come up with is that DC is already publishing stuff to reflect the state of things after "Convergence". But, that is all speculation with a dash of rumour for now.
Earth 15 - that entire universe was destroyed by Superboy Prime...
Of course, the one I most wanted to see comics based on is the one that stays gone.....
his is what intrigues me about the upcoming Marvel's "The end of everything" thing they've been hinting at. I would love it for them to just end everything, yell "ETCHA-SKETCH!" and start over. In fact, the starting over thing is kind of what got me into Ultimates. Which was actually doing pretty good at being consistent up until I couldn't afford to read it anymore. Never really did get back on track with that one.
That is pretty much what they are doing, not unlike DC's original "Crisis on Infinite Earths". They are going to modernize and streamline. It is probably best to assume that most everything is getting tossed.
So long as they keep the same creative teams (even if they rotate to different books), I will stick around.