To speak logistically; I think FNAF will eventually come to Horror Nights.
How fast, depends on who is the distribution company.
FNAF has become a mascot of easy to make horror titles; and that knowing Cawthon, it would easily allow him to collaborate with a highly respected group that could extend his stories immersively.
I think FNAF will come, especially with Blumhouse being featured heavily this year. In what form, that is to be guessed.
That said, onto just saying something; Blumhouse has a stellar facade so-far. Looks a helluvalot better than the Orlando facade, and feels like it works great with the environment.