Multiverse (New 52) - Earths:
Earth 0, also known as New Earth, is the foundation stone of the Multiversal structure. It has survived several attacks, surgeries and reconstructions on the way to its current form. On Earth 0, the greatest young superheroes of the age are at the peak and pinnacle of their powers and archievements.
Flashpoint (Volume 2) #5 (October, 2011)