Well the question was answered without me asking it.

The question was does a twist ending like the suspected big bad turning out not to be really evil have warrant within a published work calling itself Lovecraftian?

OK, i know you said you had this, but I had already come up with a suggestion, so maybe you'll find some other use for it:  if they are as efficient as you say about tearing down older construction and putting up new within weeks, it would stand to reason that they are generating a lot of construction waste, which has to go somewhere.  Maybe there is a landfill somewhere with all this stuff that baddies set up shop in, proping up chunks of wall and scrounging old piping, or digging out modest tunnels throughout as they excavate for useful cast-off.

Well Korean law has it set up where most everything is recycled in some way. there are a few places where there are mounds of garbage and waste, but they are realtivly small in comparison to the size of the city. I probably will use them in some context but not as the main hiding place. Possibly foraging grounds for food or followers.

That sounds awesome but Im not seeing your question.  I have a few though:  How did such a powerful being get forced into said role?  Ancient Mystical Binding spell?  Did he make a bargain and get the shaft? Is there some even more Uber entity out there antagonizing him?  Did humanities growth/presence inadvertently screw something up and somehow trap him?  If he is shouting for help, how will such relatively tiny and fragile creatures be able to help him?

I a little torn on how it got stuck where it is. I have two ideas. The most logical would be that it was already imprisoned here centuries ago and humanity discovered it and its jailors (the lesser abominations). They were driven mad by the revelation of finding this place and mistook it for a fallen god and the jailors saw no reason to dissuade them and in fact played along in order to spread corruption. What actually imprisoned it would be left to mystery which should inspire fear given how strong this thing is and there is something out there that bitch slapped it into a jail cell. The other is that the creature was imprisoned by the mortals who now worship it, though most of them are unaware of this fact. They managed this because the creature has something that already partially binds it to the world, something it has to protect. The cultists used this to force it into a binding.

In either case the creature does have something that it is protecting that is key to the story.

As for back story, o_O, the creature is very powerful but it also has a job and can only act within the confines of performing that task. It is otherworldly but is cut of from that other place from which it spawned. Thus its choices in asking for help are very very limited to what is around it. Humans or animals. It is also not the only one of its kind though this will not really come into play much in the story. Most of these others are not imprisoned but many are. I think the city infrastructure could be used as part of their bindings and dive into the conspiratorial cults and secret societies that have influenced the construction of several major cites in the world.

Okay I have the little bastards nailed down to a location and even how they can move around the city without causing to much suspicion.

Now I have another question for you. I want to throw in a twist at the climax of the story where the big bad that all the lesser bads worship as a dark god actually isn't malevolent at all but has been forced into this role due to circumstances that it is not at all pleased with. This being is still mind shatteringly powerful and beyond human comprehension that even being in the same general area of it can drive you mad. The nightmare fuel it inspires in people that it comes in contact with are its cries for help. However, because it is what it is and the circumstances that led it to its current position it can't really be gentle about it.

However its true intentions and motivations are left to mystery.

I know it contrasts with the general concept of Cosmic Horror but there is not happy ending in this story, or at least its a very dark grey ending. I took my inspiration from the fact that angels, the messengers/warriors of the Almighty are freaking terrifying to behold. Whether the creature in my story is an angel or something else is up to the reader in the end.

Seoul doesn't really have abandoned buildings. In Korea when someplace goes under the rip it down and rebuild it in a matter of weeks, they are very officiant in that way but things have a tendency not to last very long. I am also trying to avoid water as much as i can for this story so as not to rip off Deepones so bridges don't work.

Google maps does but not of the underground. Due to the strife between North and South. You really don't want to be labled a North Korean sympathizer here.

i never put my villains in a situation where I would have to write them harming a child, teenagers (16 and over) are fair game. I am ok with giving vague descriptions of the aftermath of something like that to build up how purely evil the particular son of a bitch is.

For my villains,  unless they are completely alien (insane or otherworldly) in their thinking, they always have a reason. Now that reason may not make much sense or could simply be to cold and calculating for most people but its still a reason.

It also depends on how i want the audience to react to the character. If I want them to despise this guy and cheer when he gets whats coming to him then he is going to do somethings that are going to make you hate him. If i want them to sympathies with them then i work that in somehow. Then their are the ones who i want the reader to love to hate, like the Joker. No one roots for him, well no one that i would want on my Christmas card list anyway, but we love him all the same.

the entrails flying head ones look humanoid until they feed then they get icky.

someone, somewhere decided sex sells. I wonder if the producers of game of thrones know the difference between a masterpiece and a porno. ugh.

personally i don't mind romance in books that much. I don't buy the books specifically for the romance, but I can ignore it fairly easily enough.

I am of the same opinion though its not limited to the show. The books have gotten rather porntastic to the point where I don't want to read them any more simply because of how over the top it is. Same goes for the Anita Blake series.

I don't mind romance or even sex in my books so long as it serves to further the story line. If it doesn't further the story then it shouldn't be in the book. That's my opinion anyway.

As for sexy pictures on the cover, yeah most of the ones I have seen are rather ridiculous. Cover artists seem to have mixed of attractive/sexy with slutty. Bad ass vampire hunter is not going to be hunting in a freaking corset and stripper boots. And its not just in UF but SSF as well in the form of fantasy armor.

Its not just women that face these sort of issues either, men portrayed in fantasy are usually portrayed as shirtless testosterone gods of sex and abs. I find this equally annoying in a different way.

Buy some damn clothes you twats. lol

Star Wars is not Technomancy its an epic space opera, yest their was some mystical elements but they didn't effect technology directly but more the living body and mind.

The Matrix is closer but not quite their in my opinion. The reason I think this is because Neo was not using magic to manipulate the Matrix but rather his mind and will. I would classify that more along the lines of Technopathy rather than Technomancy. A fine line to be sure but still one that I think is there.

From what i have seen technomancy is rather rare in pop culture. I have seen it used in RPG's in two different ways. First in Shadowrun where technomancers used magic to commune with the Ghost In the Machine GIM in the form of sprites that they could manipulate. They were essentially hackers that used spells rather than computers and astral projected themselves into the computer world. I have also seen it in the Rifts setting and to a lesser extent D&D with Techno Mages and Artaficers but that was more along the lines of infusing technology with magical properties like a gun that could fire shuriken and lighting. 

I have always enjoyed creating stories, ever since i was little. My imaginary friends had very thought out back stories and our adventures could have filled a novel. I didn't actually start putting words to paper seriously until i started taking collage level writing courses.