Dracula & Velken vs Michael & William Corvinus
Dracula and Velken, from the film Van Helsing
VS
Michael and William Corvinus, from the film Underworld: Evolution
They are fighting to the death in a ruined old castle. They know nothing of each other prior to the fight. For the sake of the fight it will be constantly nighttime, and neither werewolf will change back into their human form. This is a test of physical prowess and feral skill.