One of these days, I'm going to have to watch Dragon Ball Z... just so I can get all the right nerdy jokes. 

I can think of two ways to make the Oblivion War make sense...

1) Things have changed.

   Once upon a time, eldritch horrors could come and go and make themselves known to early man.  Something changed (perhaps the building of the Outer Gates or the rise of organized pantheons of gods who pushed out other powerful beings who might compete for worship) and now only the knowledge of free-willed humans keeps them tethered at all to our world.

or

2) First Contact is Hard.

   In Proven Guilty, Harry describes how things can cross over from the NeverNever -- either someone here calls to it (even unconsciously as it turns out) or something really, really powerful pushes it through from the other side.

   It stands to reason that something making contact from "the other side" for the first time would have to push through -- requiring a substantial amount of effort.  Perhaps it's also hard to find our world out of all of the possible worlds and the vast space of the NeverNever, so it would take an eldritch horror a long time and a lot of energy to get back here once it's been forgotten.

The NeverNever is much bigger than the Earth.

Although you can open a Way from anywhere on the Earth and get to somewhere in the NeverNever, I'm not sure the converse is true.

Example: I doubt that there's anywhere on the Earth from which you could open up a simple Way and find yourself inside the walls of Arctis Tor -- it wouldn't be much of a fortress if you could.

Same with places like the Outer Gates, the Mothers's Cottage, and any number of religious holies-of-holies.

Given that this is the DV, the real answer is probably "All of the Above".

That's more along the lines of traditional meaning but the one thing that stands out is that (I think) Jim said that when the Black Court was being attacked by humans there were KoTC, wizards, other vampire courts, and even some Saints.  I might be remembering it wrong but I thought it was something like that.

Yeah.  We've seen that faith is a source of magical power -- from the fake Shroud of Turin to Michael's prayers.  I'd imagine there are people with a bit more magical training who have learned how to channel faith magic specifically.  (I remember there being some hints of that in one of the White Council meetings -- maybe the one at the end of Turn Coat?)

I'm picturing a priest whipping a congregation up into a pitchfork-and-torches kill-the-vampire mob, marching at the front with a sacred relic, and channeling the faith of the crowd into magic spells.

Perhaps something like that is what HD/JB meant in the Black Court quote.

So, yeah, what Griffin said. 

Of course with what we know now, I suspect a half-vampire like Martin would count as mortal-enough, and probably there would a magician or two among the servants of the literally damned Court.

Good point.  And they'd have a long, long life to study magic.

One reason I think Nemesis is connected to Wizards is because it reminds me a lot of like what Molly did to her boyfriend when she mind controlled him.  Not only did she control him but the end result of such control is insanity of the person being controlled.  The way it "spreads" is like a wizard creating a conduit between himself and the one they want to control.  That first link was the Athame, provided by Cowl and the Black Council.  Nemesis didn't just start controlling people, it needs a connection of some kind.  Again this sounds a lot like a wizard to me or group of them. 

The more I think about it the more I think that the Black Council is a group of spell casters that create a link between themselves and their target, and working together overpower the mind, and bend to their will...  Nemesis, the Adversary are actually a cult of dark wizards who's goal is to become the rulers of reality.  Perhaps Merlin created the White Council because of the Black Council.  That could mean the Black Council has existed before the White Council...

I like this idea.  It consolidates two of our mysterious behind-the-scenes enemies (BC and Nem) into one.

Lots of interesting questions come out of this:

• Cowl's "end death" sales pitch... was that just tailored for Kumori, or is there more to it?  (See: Dr. Strange's villains who want to end death by making a bargain with Dormamu...)
  
• What would an Outsider victory really look like?  (And what do the conspirators think it would look like? What do the members of the Circle/Black Council/"Nemesis" want?)
  
• Why is it so dangerous to speak the word?  Is it like the Merlin's fear of acknowledging the Black Council's existence?  (That many wizards and sorcerers would join the "rebellion" if they knew of it, without knowing the full story?)
  
• Why haven't they tried directly to recruit Harry?  (Or *DID* they -- was Kumori's approach a first attempt at this?  Is that why Cowl left Harry alive in DB?)
  
• Which side is Nicodemus on?  Does he support the conspiracy or oppose it?? 
  

Or maybe it was. Fae are basically immortal, so 6 warriors might be the fighting equivalent of 600 years. Assuming that some die young while others last several hundred years or millennia.

Sure, but you still have to put them in to proportion with the size of the army they will serve in -- millions strong.

This was more important as a symbolic gesture.  There are many, many more places where outsiders/Fomor have been picking away at Winter's recruiting -- because Winter appeared too weak to defend them.  Molly will no doubt have to make a few more examples, but word will get around.