I have a human AU for EthGoesBOOM with basically the entire story rewritten to apply to the characters as humans! Here are some bits and pieces of the AU:

-Freddy, Bonnie, Chica, and Foxy all grew up and went to school together

-Golden Freddy is Freddy's older cousin

-Bonnie and Toy Bonnie are adoptive brothers

-Chica and Cupcake are siblings

-All of the Cupcakes are young children

-BB and JJ are twins who were separated as infants, then reunited and discovered they were siblings years later

-Foxy is BB and JJ's adoptive father

-Mangle has permanent disfigurements after being attacked in the street by a gang

-Foxy was born without one of his hands

-When Golden Freddy and Spring Bonnie were younger, Michael pushed Evan/The Crying Child out into the road, and he got hit by Golden Freddy's car. The accident killed Evan and put Spring Bonnie into a coma. Golden Freddy was the one driving so he lives with trauma and horrible guilt, even though it wasn't really his fault.

-Spring Bonnie miraculously woke up from their coma, and is slowly recovering.

-Elizabeth was kidnapped as a child and raised as Circus Baby in an illegal freak show, along with Ballora, Funtime Freddy, Bon-Bon, and Funtime Foxy

-The Minireenas are still Ballora's children, God knows who their father is though (It's probably not Puppet)

-Funtime Freddy and Bon-Bon are conjoined twins

-Nightmare and Nightmare Fredbear are Plushtrap's foster parents. Needless to say they are not doing a good job.