Sister Location is the incoming FNAF which will be out this fall.
We don't know much of the game, but by seing the trailer we can see some things.
Like we can go through air vent or that where we are is like a deep underground circular base.
I will let you see the trailer to see what do you find.
The animatronics in this game are:
Baby
Ballora
Bidybab
Ennard
Foxy the Pirate (Funtime Version)
Freedy Fazbear (Funtime Version)
Minireena
Here you have the OFFICIAL trailer of Sister Location (FNAF 5)