Alucard VS DIO is a What If? battle between Alucard from the Castlevania franchise against DIO from Jojo's Bizarre Adventure. The characters related in their abilities and backstories, with both of them being sons of villains who followed different paths from their parents. Both are dhampyrs, Alucard being the son of Dracula and a human and DIO being a vampire thanks to the Stone Mask.
A battle between half-humans, half-vampires whom followed different paths of their parents. Who will win, the prince of darkness or the user of The World?