Chaosmancer
Legend
What about Blood Hunter, which was inspired by Wildemount as I understand it?
Again, they would probably be publicizing a new class in the book if that was the case.
None of the promo blurbs have said that the Blood Hunter will be in the Wildemount book, so I have no reason to believe it will be made official.
The Bloodhunter is currently available on DnD Beyond's Character creator. It might not get published in a book, since it is free on DMs Guild and DnD Beyond (to my knowledge, someone is content sharing with me so I don't know if they had to buy it separately)