Jim has said that in the DF universe, pretty much everything exists (Bob has corroborated it in book too). Spiderman? Yup he's around somewhere (kinda in the nevernever). A place long long ago and far far away where the things are governed by the Force? Yup, and Harry could even conceivably get there, but once he did, he probably wouldn't be able to use his wizard magic, and would be stuck as a pleb.
Jim even has plans to write a "Mirror Mirror" book. Apparently Marcone is supposed to play a big roll in this book.
Additionally, beings along the power levels of Uriel are not necessarily limited to dealing with what happens in the reality/timeline that Harry and the books are transpiring in. Instead he is dealing with the entire tapestry of possible realities and timelines that can and do branch forth from every moment. In my mind this is heavily influenced by free will choices causing all these branches and parallels.
The point I am getting at, is that in the DF, Reality is a lot more expansive and encompassing than what just one puny "living" mortal can exist in and fathom. And conflicts like the Outsiders trying to break into our reality and subsume it, are actually existing and transpiring on that higher level of breath. Apparently, all the things that have transpired in the book are a lead up to all these big heavies gearing up for a major power shift along this level of magnitude. When Vaderrung and the Gatekeeper say that Harry's dalliance with death makes him even more of a fulcrum to affect change, they are saying that he has brushed with this higher level of existence. The consequences of that experience and all this additional build up is that he will be the axis that all these changes throughout the entire breath of the tapestry of reality will pivot on.
Some theorizing pulled from later posts in this topic:Some more NN theorizing:
I believe it was in GP that Bob talked about dreams and shades making pockets in the NN. I had intended to mention Agatha Hathorne's pocket in the NN in my last post but forgot, and you beat me to it elsewhere.
It's interesting that Lea can walk into Agatha Hathorne's NN pocket from elsewhere on the NN side of things...*
So thinking in terms of Chicago and the NN, there are probably multiple dimensions of the NN that are overlayed over the Mortal plane (I prefer that term over RL)
- There is the plane that Harry cruised around during the beginning of GS,
- The plane that Harry cruised around in during the rest of GS that parrallels the Mortal plane close enough that he could see most of what was transpiring in it, but most mortals couldn't percieve back in the other direction (I'll call this the GS plane).
- I suspect most of "Heaven's" crew normally typically operate on a seperate plane that Uriel took Harry too at the end of GS. One that even the "ghostly attuned" can't percieve
- Then there are the pocket planes that can be overlayed between that GS plane and the Mortal Plane that are shaped from the will of certain mortals or mortal shades like the shade of Agatha Hathorn.
- Planes that can be brought to be by supernatural beings
- Mab and Titania's "over chicago" battle royalle plane specifically mapped the topography of the land it overlayed.
- Various "Ways" and portions of Fae and other NN realms (I.E. Hades, down below, olympia, whatever) that topographically connect to the mortal realm because of similar natures. This seems to mostly** be a seperate set from all the above.
- I suspect there are parallel dimensions that split off based off of mortal decisions and such. These dimensions are things that beings like Uriel have enough oomph to have domain over as I mentioned in my OP.
- Interestingly, judging off of what Lea mentioned in GS about records of human experiences being stored in places other than their wetware, plus some of Harry's experiences with Lash, I suspect there are levels of existance where these "records" exist, and I highly suspect that beings of angelic nature exist on/have access to them.
Interestingly, sufficiently powerful beings seem to be able to shape a preexisting portion of the NN to their desires, not unlike a construction crew can shape a hillside for a subdivision. Remember Evil Bob's Normandy, and Lea's garden.
Harry's "Nevernever" term is a catch all term that refers to all of the above plus more that he might not even be aware of (not unlike his usage of the term "demon").
By the way, it is my opinion that Harry's trip to the grey fuzzy areas of life and death have given him a certain affinity to these extra planar portions of the NN in such a way that he can possibly visit them or otherwise capitalize on (or be capitalized on from muahahaha) them in ways that other mortals can't.
*Lea exists on more than one plane though, as evidenced by her being corporeal to Ghostly Harry
**emphasis on "mostly"