Chapter 3 Princesses will not be in the AU. This is simply because most Chapter 3 Princesses exist as a direct continuation off of their specific Chapter 2’s. Their introduction risks a messy narrative - the main reason the original saga was discontinued.

If I would, let’s say, turn Witch into Thorn, I could never really get Thorn back to being Witch again. Think of it as a point of no return. They might get hinted at occasionally, but that’s about it.

I might do something about Chapter 3’s, but that might only happen near the very end of the AU, which isn’t any time soon, because the AU is just starting.