Yeah, I know this may seem like a stretch, but hear me out for a second.

The kid possessing Nedlyonette (or "Kid" as I'll be calling him) said he had a new appearance (which is Nedlyonette), which made me wonder what did his original appearance look like before FTAH 2?

That, and The UnWitheredTruth's propsal if Mangle/Toy Foxy being a holdover got me to speculate that New Nedlyonette may be an old robot (NOT Botsons) by Nigel that /somehow/ got turned into the NewBot

(I personally imagined Nigel melted down the old robot MoltenMCI style)

(Though that line probably doesn't relate to my propsal, but still.)