I can see what you mean since while Lovecraft was early 20th century, his work is definitely not Victorian horror-esque, but to play a little devil's advocate:
-Wouldn't white/blue cultists be the perfect counter-faction to red/black cultists, along the lines of the Orders of Leitbur and Ebon Hand?
-Gamers do love their Cthulhu (at least, many of us do), and Wizards has made nods to the works of Lovecraft before.
-Related to the opposing cultists, certainly there can be more than one thing to worship, and having something like a water god that is the ancient enemy of whatever the red/black cultists worship makes for interesting enough lore.
Edit: Ha! As a random example of just how influential H.P. Lovecraft is, if you look at Absolutionis' post at the top of this page, you'll notice he uses the word "eldritch," which just randomly happens to be a word invented by Lovecraft.
Yeah Illusions aren't very horror genre specific, nor are they very W in flavor - although they do fit with whats been printed lately, still unlikely, illusions are probably an M12 specific thing. Perhaps UW will simply be human, but I doubt that too.
Personally I think the most likely tribe for UW will be the Amphin Salamanders. If you read Amphin Cutthroat's flavor text it talks about a civilization built in secret which is lead by an order of priests. This sounds very UW, particularly W, to me. It also does not fit in with the theme of a "rouge" "cutthroat". It is obvious that this card was printed as a hint into a future tribe, and given that INN has a tribal sub-theme, the puzzle pieces seem to fall into place.
Moreover a race of sapient, religiously indoctrinated, lake monsters (being salamanders implies that the Amphin only live in fresh water) invading the shore allows Wizards to create a UW tribe that fits into both the "gothic horror" genre and the color pie.
Actually, while they usually don't refer to a plane specific race or organization in core sets, your idea of religiously indoctrinated sapien creatures is right on the money for classic horror from one of the greatest authors of the genre, H.P. Lovecraft. "The Shadow Over Innsmouth" (even sounds akin to Innistrad) is about an old coastal New England town with a dark, secret history of making demonic pacts with aquatic abominations (very blue) and even mixed their bloodlines so that many people from Innsmouth have fish-like appearances. The town is presided over by the Esoteric Order of Dagon which is basically their religion (very white).
So while the white/blue tribe may not be salamanders, your suggestion of a secret society with ties to sea creatures that organizes itself in the form of a religion is dead on as far as fitting with a classical horror theme.
Edit: And so you don't think I'm trying to overblow the importance of this story, those not familiar with the story may still know of the aquatic creatures it speaks of, deep ones, seeing as how they are a core part of H.P. Lovecraft's greater mythos, usually termed the Cthulhu mythos, which truly is one of the single largest entities in the genre. The particular story I mentioned was even adapted into a few movies, the most commonly known being the terrible movie done by Stuart Gordon renamed "Dagon."
-Wouldn't white/blue cultists be the perfect counter-faction to red/black cultists, along the lines of the Orders of Leitbur and Ebon Hand?
-Gamers do love their Cthulhu (at least, many of us do), and Wizards has made nods to the works of Lovecraft before.
-Related to the opposing cultists, certainly there can be more than one thing to worship, and having something like a water god that is the ancient enemy of whatever the red/black cultists worship makes for interesting enough lore.
Edit: Ha! As a random example of just how influential H.P. Lovecraft is, if you look at Absolutionis' post at the top of this page, you'll notice he uses the word "eldritch," which just randomly happens to be a word invented by Lovecraft.
Actually, while they usually don't refer to a plane specific race or organization in core sets, your idea of religiously indoctrinated sapien creatures is right on the money for classic horror from one of the greatest authors of the genre, H.P. Lovecraft. "The Shadow Over Innsmouth" (even sounds akin to Innistrad) is about an old coastal New England town with a dark, secret history of making demonic pacts with aquatic abominations (very blue) and even mixed their bloodlines so that many people from Innsmouth have fish-like appearances. The town is presided over by the Esoteric Order of Dagon which is basically their religion (very white).
So while the white/blue tribe may not be salamanders, your suggestion of a secret society with ties to sea creatures that organizes itself in the form of a religion is dead on as far as fitting with a classical horror theme.
Edit: And so you don't think I'm trying to overblow the importance of this story, those not familiar with the story may still know of the aquatic creatures it speaks of, deep ones, seeing as how they are a core part of H.P. Lovecraft's greater mythos, usually termed the Cthulhu mythos, which truly is one of the single largest entities in the genre. The particular story I mentioned was even adapted into a few movies, the most commonly known being the terrible movie done by Stuart Gordon renamed "Dagon."