Now, these are just personal suggestions mind you, but:
I have to agree with Akunin and some of the others--as is, this campaign SEEMS simply too derivative for publication. This is fine--as has been pointed out--if you just want something for you and your buddies to play around with, but any originality in the setting is going to be dwarfed by what many readers will see as lifted ideas. So...
What I would advise is that you take a good look at the different aspects of the setting and see what is original/not so original, and what is essential/non-essential. From what I've read, I think that you have plenty of original ideas here that can do what you want to do, without the questionable associations.
For instance, you are using a biblical tone/frame of reference:great.
Angels, demons, heaven, hell, planetouched, etc: fine
Vampires: oops.--in today's rpg world, this is like trying to create a good drow ranger PC and claim you've never heard of Drizzt. Esp. with the different houses/clans, it's simply too similar. So, look at the role that the Vamps play in the world, and figure out a good replacement (As an added benefit, creating a race here will make an infinitely better PC option, as the vamp from the MM really doesn't lend itself well to PCs or much modification).
Basically, you've got a race, descended from Cain(?) that has lived in a magic-rich wasteland ringing earth for millenia. They're exceptionally skilled with magic, tainted with the touch of the divine AND infernal, and probably a little dark. Great House dicisions are fine in this scenario, esp. if you go for a very byzantine feel to the political climate. If you don't want to just go with planetouched, just create a race with a long life-span and some abilities inspired by their environment. If you have the FRCS, take a look at the Shades--even drow would seem to fit into the role easily.
And if you're going to use biblical myth, I have to second the suggestion that you try to follow you're source material pretty closely. The reason that WW's Vampire backstory worked so well is b/c it explored the holes in existing history more than it contradicted.
Anyway, thats my 2 cp. Hope it helps--and just so you know, I wouldn't have spent the time to write all this out if I didn't think that the idea had merit
Amos
I have to agree with Akunin and some of the others--as is, this campaign SEEMS simply too derivative for publication. This is fine--as has been pointed out--if you just want something for you and your buddies to play around with, but any originality in the setting is going to be dwarfed by what many readers will see as lifted ideas. So...
What I would advise is that you take a good look at the different aspects of the setting and see what is original/not so original, and what is essential/non-essential. From what I've read, I think that you have plenty of original ideas here that can do what you want to do, without the questionable associations.
For instance, you are using a biblical tone/frame of reference:great.
Angels, demons, heaven, hell, planetouched, etc: fine
Vampires: oops.--in today's rpg world, this is like trying to create a good drow ranger PC and claim you've never heard of Drizzt. Esp. with the different houses/clans, it's simply too similar. So, look at the role that the Vamps play in the world, and figure out a good replacement (As an added benefit, creating a race here will make an infinitely better PC option, as the vamp from the MM really doesn't lend itself well to PCs or much modification).
Basically, you've got a race, descended from Cain(?) that has lived in a magic-rich wasteland ringing earth for millenia. They're exceptionally skilled with magic, tainted with the touch of the divine AND infernal, and probably a little dark. Great House dicisions are fine in this scenario, esp. if you go for a very byzantine feel to the political climate. If you don't want to just go with planetouched, just create a race with a long life-span and some abilities inspired by their environment. If you have the FRCS, take a look at the Shades--even drow would seem to fit into the role easily.
And if you're going to use biblical myth, I have to second the suggestion that you try to follow you're source material pretty closely. The reason that WW's Vampire backstory worked so well is b/c it explored the holes in existing history more than it contradicted.
Anyway, thats my 2 cp. Hope it helps--and just so you know, I wouldn't have spent the time to write all this out if I didn't think that the idea had merit

Amos