It may be related to FNAF, but there is still a distinction to be made. The game seems to be presented as a spinoff title more than a sequel, as evidenced by the title of the trailer only referring to the game as Sister Location. There is a combination of both new and old animatronics, and the new ones do a great job I think of tapping the uncanny valley. Saying that it doesn't scare you at this point when we know so little I think is rather silly. Who's to say what this new entry will really be like? Scott has expressed a desire to try new things and this seems a perfect opportunity to turn the tables on us the players, so maybe it will scare you again.
Have you seen the trailer? Gives me goosebumps every time, I love it.