Since the 'Ultimate Custom Night' thing is not really part of the story (At least i think so),it won't necessarily count as one. Unless Scott uses more of his sneaky skills to add details we hadn't known.
From what i remember,the story ends at FFPS with the building burning down. Actually i'm not sure if whoever the protagonist is survives the fire. If he's not part of the Afton family,well,i guess that'll be alright for my story. Actually,now that got me thinking to who that guy is.
Not really. Look at Star, he's on his way getting his own book into the stores (not there nearly yet, but a day will come), and he doesn't always throw a period at the end of his sentences. The way I see it, it just depends on how they want to present it.