An Analysis

The first thing that happens in the trailer is a wall with drawings and paintings on it. I'd recommend putting the Freddy painting side by side with that epic face meme. You can see similarities, can't you?
HE WILL COME BACK:
We see a hallway, with the Pirate Cove curtain covering the ceiling.
HE ALWAYS DOES:
We see Bonnie, Freddy, and Chica standing in a line. Freddy has no eyes and his bowtie is black with white spots, even though it's supposed to be black. Bonnie-yeah, his eye slowly turns around in a creepy fashion.
WE HAVE A PLACE FOR HIM:
We see a Bonnie-like animatronic shake around, almost like he's trying to get out of the costume. The camera pans slowly towards his left eye.
FIVE NIGHTS AT FREDDY'S 3:
We see the new animatronic's jumpscare. The scream sounds like a snake swallowing water with numerous small shavings of sand paper in it, all the while the snake's tongue on the roof of it's mouth.