Vampires Vs Werewolves in BFH

So here's a thing: Werewolves and Vampires are being added to free FPS Battlefield Heroes. It's some kind of micro-payment event, lasting a month, where you can pay to be able to rise again in the night maps of the game. "Once-dead Nationals can be transformed into blood-sucking vampires and Royals into teeth bearing werewolves." Okay then. A trailer, below, explains a bit more.