I suppose that you know that there will be an official sequel to "Dracula" made by the grand grand son of Stoker based upon some notes of his grand grand father where he planned a sequel.
The problem with Castlevania is, the new novel will be at 1912, and the hunter will be Quincy harker (Son of Jonathan) and Dracula is resurrected, it appears to be.
So, perhaps, the Bloodlines and the POR could be erased or edited in time and facts, because Castlevania still has as main refference the original novel.
What do toy think about it?