WHAT?!

I'm just gonna continue my job as that guy that brightens shit and finds what's going on.

We've got some interesting stuff with Caeser keys this time (thanks to Redditor Hidlive for this).
"Cyh gvh gpe"
"All Content Copyright 13,12,11 Scott Cawthon"
Caesar Key 13 – CYH → PLU
Caesar Key 12 – GVH → SHT
Caesar Key 11 – GPE → RAP
PLU SHT RAP
PLUSHTRAP
We can assume Plushtrap is the name of ol' Mini Springtrap here.

Also, brightening the image gives you this:

Seems to be a home rather than a pizzeria, so we can assume Plushtrap's in a hallway leading to different rooms like the kitchen and living room and such. Maybe Plushtrap's actually sitting in your "office" of sorts, which would be an interesting setting for the game. Also, if those halls are like doors, we might have four doors to deal with.

Man, this game's gonna be weird.