Amazing insights, all. I really like Jekylhyde14's take on the emanations thing. But the further question arises: If there are multiple emanations on multiple Earths, then does that mean there are also multiple versions of Apokolips and New Genesis? To reiterate, I can totally buy that Johns' New 52 Darkseid is an emanation of the higher version that exists outside and above, but we've seen him and his cronies (which must be emanations themselves) hangin around Apokolips. And we've seen New Genesis in the New 52 as well. Are these God Realms merely emanations of the REAL Apokolips and REAL New Genesis? Also, does the same apply to the Rock of Eternity?
Thanks for reading and for the kind words! Sorry I didn't reply sooner. My best guess where New Genesis and Apokolips are concerned is that they're emanations of the real thing just like the gods themselves. As I said before, the emanations theory is just a personal theory, but it makes sense considering the New Gods we've seen on Earth-0 look different from the New Gods seen on Earth-51 in The Multiversity Guidebook. I can only assume that if the gods are different then the planets are different as well and, therefore, emanations of the higher Apokolips and New Genesis.
I can, maybe, be more specific when it comes to the Rock of Eternity. We know that the wizard Shazam seen in Earth-0 is much different from the wizard Shazam on Earth-5. However, the Rock of Eternity seems to rest on top of and below The House of Heroes on the Map of the Multiverse. In the Multiversity #1, Captain Carrot says The House of Heroes is "-rotating through the fifth dimension around a fixed point in the structure of the multiversal Orrery of Worlds!" The fact that it's rotating through the fifth dimension and Bleedspace causes the architecture of The House of Heroes to shift and change. I'm pretty sure we can assume that the Rock of Eternity works in a similar way. In the Multiversity Guidebook, the Hannibal Lecter Sivana describes their artificial Rock of Eternity like this:
Let's picture the Rock of Eternity as a top spinning through the fifth dimension like Hannibal Sivana suggests. The top is in a fixed point that intersects with all 52 worlds of the multiverse. It's the same top if seen from the fifth dimension, but its appearance and contents are different in the third dimension depending on which world you are in. There is one Rock of Eternity but it's different depending on what world you're seeing it from. You could then ask, well, why doesn't The House of Heroes act the same way? I would shrug and say. "Monitor technology?" Though, the House of Heroes does act in a sightly similar way with its shifting and changing architecture. This is the best theory I could come up with, but, again, it's a personal theory. It'll be interesting to see if there are any official explanations in the future and if my theories stack up to them.