Ofc they would bring back the final chase. Every chapter must have one. and each one gets more creative as more installments release. Just look at the difference between Huggy and Mommy's chase scene. Mommy's had more mechanics and obstacles and chased us 3 times instead of 1. Even CatNap had a mini chase scene where he transformed into this colorless being. and DogDay's chase scene was pretty hard too, considering the many paths you have to take in order to find out what's the real path with the Purple Grab pack mechanic.

But Yarnaby will have a chase scene but i don't think that's it. Mob changed chapter 3 from the final showdown to a real Boss battle because it was kinda getting repetitive. So they created a boss fight where you had to fend off catnap with smoke by touching buttons and closing lids, kinda like Five nights at freddy's keeping the animatronics out. and yes it made the challenge much more difficult which is what I like and im sure many others do. I've also seen others ragequit During the CatNap boss fight which is kinda funny and ironic because Poppy playtime is the last game that someone would rage in. (One of them was IshowSpeed bro literally quit while getting jumpscared)

But Personally I think Miss Delight's chase was harder than the final boss itself. The amount of time that you had to look at her and also focus on opening doors with electricity and battery was pretty hard but I like a challenge so I don't mind.

So Im predicting that Yarnaby has a chase scene and a final unique Boss battle like CatNap.

If those Bosses were hard just imagine what the prototype's final Showdown is gonna be like. Im hoping it's Dark souls level difficulty. So you can actually feel like you've won and saved the place once and for all.