This is probably wishful thinking, but it COULD in theory at least, be a
Silent Hill game. Kojima has been known to pull stunts like this in the past. Yet on other forums, some users act like fans are to blame for this mess, as if we are not supposed to be putting two and two together, and that "it's our fault" for looking into things too much.
What's difficult to determine is that survival horror games often share a similar theme or premise, so realistically speaking, any
Fatal Frame game could be like
Silent Hill in terms of the atmospheric tone, and even the recent first person
Resident Evil games felt somewhat supernatural, with that creepy Miranda and the house with the dolls, and the trees. So it's not easy to connect this to one game.
Either way, I doubt this is connected to Konami's franchise. They already said so. And this looks like a glorified indie game. It's only getting this much buzz because of all of the hearsay that has amounted about it. Coincidentally, it's also a certain anniversary of a certain demo tomorrow. A demo for a game that was, (gosh!) cancelled years ago.
As for the stuff on Pop Topic. If an "insider" says one thing, you have to take it with a grain of salt. Typically, they'll start any rumor mill if it's going to get people riled up, which isn't very hard to do if it is about a long left alone series they admire too much.