User blog comment:SeraDreams/Five Nights At The FNAF Fanon Wiki 3, and 4/@comment-28629433-20160101154909/@comment-28045617-20160101162513

I'm considering making both very unique.

The 3rd one will have 2 animatronics, no phantoms, and they are extremely difficult [Dove Of Death, Demonic BB]

The 4th one, instead of nightmares, will be the "Bloodthirsty" animatronics, you will be in an abandoned storage, where someone has messed with the old animatronics design and AI, and you and your stupid teenage friends decide to check it out, little to know, you, the player, are locked in for five nights.

So they are not too alike to the original FNAF games.