TKDitto613 Kobaltic and everyone else, watch these two videos before reading:

-Theory-

So, if you're reading this, then you have watched both videos up top. This is vital information as to what will happen in this Theory and potentially Chapter 5 as well.

But my theory is, and this is what I am sticking with until the chapter is out, Henry will become Perfect Bendy by the end of chapter 5 Now I know this may seem crazy but hear me out. Henry says in the audio log in the second video.
"My captors don't know what to think of me. I guess that makes sense, because I don't even know what to think of them either."
It seems to me that Henry is slowly becoming perfect Bendy as each chapter progresses. It all starts with chapter 1 and the beginning of chapter 2 when he's in the pentagram and he wakes up in Chapter 2 and he is inside of it so what's to say couldn't have started there and as each chapter slowly goes on Ink Bendy starts to realize there's something going on with him. By the end of chapter 5 Henry might fully become Bendy now you may have heard that before somewhere on you on Twitter but it also explains why in chapter 4 of BATIM that Bertram Piedmont attacks Henry and he thinks it's Joey because once he opens it he attacks on sight. The transformation process might begin with the physical things inside and then maybe like the head, torso, and limbs and everything else because I mean Henry has all the personality features of Bendy from the cartoon so what's to say he can't become Bendy? So by the end of chapter 5 we can have Henry/Perfect Bendy versus Joey Drew or the imperfect bendy to try and settle this madness once and for all.

Can we also point out that Boris from Chapters 2-3-4 might be revived and joining Henry alongside Allison Angel / Allison Pendle and Mecha Boris/Thomas Conner. As well as the captors being actual demons and I think Allison and Tom(Thomas Connor) might have a big fight at some point?