The Apocalypse is coming! Who knows and who cares?

I was toying with the idea of a place where demon spawn were raised or a place where children with magic were raised, and then I came up with the idea of putting them both in a world where the Apocalypse (here known commonly as the Last War) is imminent and all sides are preparing. This goes way beyond Heaven and Hell--All Myths Are True in this world and everyone has a stake in seeing this war go their way. The question is, who's everyone?

I have the demons breeding with humans, trying to create a half-breed that has the strengths of both and the weaknesses of neither (they're not doing too well there), magicians gathering children with magical talent into compounds and raising them for war, faeries doing something-or-other which I haven't figured out, and angels giving some of their more devout followers some of their powers and training with their weapons since breeding with humans doesn't go too well for them. And here I get stuck. Who else is involved? Obviously the different pantheons are involved--but are they working separately or have they banded together to beat everyone else? And if they're working together, does that really make this the Penultimate War if they win, since they'll probably turn to fighting each other afterward to figure out who REALLY wins the world? What about the supernaturals? Do they care, or care enough to fight? Or are they just going to play mercenary and work with whoever gives them the best offer?

And what humans know? What still-active religions allow for humans to receive or figure out the information that the Apocalypse is coming? Are there any active religions that use shamans, and would they be able to get that information? What about the priests in Santeria? Wiccans? Pagans in general? Are there any prophets still around in Judaism who might get hit with this information? Might mystics of various religions find out from their respective gods? Who knows? And what can they possibly do about it if they find out?

What humans know? Since I'm not really familiar with your world and don't know what religions there are or how people react to them, I can't really say. However, I would assume anyone with a connection of some sort to the supernatural people would have heard at least cryptic hints. Not to mention those that are trained by, say, the angels would undoubtedly notice. Also, there may be religious people who interpret the apocalypse just like people in RL do. Whether anyone believes them or thinks they're nuts is up to you.
As for the different pantheons, I think there might be some who ally themselves with others, some who work separately, some who stab their former allies in the back because they were just using them, fighting within the pantheons (Horus vs Set kind of deal, the Jötnar, Æsir, and Vanir form separate sides, etc), and all sorts of scenarios like that.
I'm not sure what you mean by supernaturals. All you have listed so far are supernaturals.