Eh...no offense but that idea is just plain stupid. Making Fnaf characters into sonic like characters is not original at all and besides, they don't look all sonicy to me.
"there gonna be real sonic characters"
Wow, Sega will love that idea. *Sarcasm*
No offense but I don't think Sega will like that. Fnaf characters are in there own game, not in Sonic's. And even if they are in the game, they will only be a cameo or something. And also they are still oc's because they are not official Sonic characters because Sega won't accept it and do you know why? It's because of copyright. Scott won't let Sega have his characters into the Sonic universe and they might get sued for putting these characters into the game. And finally, if you say that they are not original, then why did you make them in the first place?
[Random intentional Skyrim reference and unnecessary reactions intensify]
^^^^^^^