In the manga, the power of illusions, caused by your level of fear, is a rather huge element, so I was thinking, what if that idea was somehow incorporated into an eventual Fatal Frame 6, or a spin-off perhaps?
We see the same kind of thing as a gameplay element in the horror game Eternal Darkness, which, if I recall, is another IP owned by Nintendo... one they haven't used in years I might add. And Project Zero is already a series where a huge puzzle element is taking photos of hotspots where something else then shows up in the photo.
Clock Tower 3 also had a fear meter, where if it maxed out, your character would panic and run wild. I am not suggesting we go that far, but having a meter similar to the one in Eternal Darkness, where the more it fills, the more the game breaks the 4th wall and f**ks with you, I think could be a neat idea (emphasis on could). Like the infamous one, where they make it look like the game takes control of your game and deletes your save file.
I dunno, is there anything from the manga that you think could work in a future game?
PS. am I the only one thinking a school could be a cool setting for a game? Just take something like White Day, put it in 3rd person, ad the Camera Obscure, an voila