-In storyline it`s a last installement (IDK if that was 100% confirmed)

-William will finally fuckin die. In the end, he can be erased by Gregory, betrayed by Vanny, or slayed by glamrocks. Or maybe even Golden Freddy will return to erase his soul out of existance.

-Vanny is Gregory`s sister, or nanny.

-Roxanne wolf will be some sort of an impostor in glamrock crew.

-Since it`s last part, maybe we`ll have answers on many questions about fnaf

-William possibly will try to return Elizabeth through Vanny`s sexy body.

-All glamrocks, except Roxanne are protecting Gregory.

-William tries to return himslef to real world, by using Scraptrap`s burnt body (it`s possibly seen in first trailer)

-Vanny and Vanessa are different persons.

-In game we play as two characters-Gregory at night and Vanessa at day.

-Glitchtrap can be the "final boss" in the game

-Vanny closely to end will return her sanity

-Vanny and Gregory can be afton family`s relatives

-In the end Vanny realizes what have she done, kills William (possibly) and than kills herself.

-Second trailer drops in march, final trailer in may, and game comes out in June