Skyland, Underworld and the Gods
So, I think all of us have seen Grant Morrison's Multiverse map by now, which happens to be one of the COOLEST things I've seen in a while. I may be more critical of Morrison than most, but I can't deny that his sheer creativity blows me away.
Onto the map itself, it shows eight realms in what Morrison has called "the God Sphere," four for each section of order and chaos: Dream/Nightmare, Heaven/Hell, New Genesis/Apokolips, and lastly, Skyland/Underworld. The latter pair is said to be where all Pagan deities reside, including the Greek Gods. This pretty much confirms that there is one set of Greek Olympians throughout the entire Multiverse, and they can exist on/visit all Earths at once, rather than each Earth having their own version.
I think this pretty much confirms that the Roman pantheon is something separate. The early issues of Earth 2 established that that version of Wonder Woman worships the Roman Gods, and I believe they were mostly wiped out by the Apokolips invasion. Obviously, the majority of the Greek pantheon has appeared in the main solo title, and Hermes at least looks vastly different from Mercury, so it's safe to assume they are different beings. But in a recent issue of Aquaman, Hercules refers to Sea and calls him both Poseidon [I]and[/I] Neptune, implying that the Poseidon in main DCU canon goes by both names. There's also Barbara having the last name of "Minerva," and (I think) her worshiping Moon by the name of "Diana."
So what does all of this mean? Is it likely that Azzarello just wrote his story without giving a crap about what Morrison planned, or did they share notes? And what does this say about how Morrison will depict the Gods in Earth One, if he does at all?