So terrorists threaten the world with doomsday, zombie inducing weapons? 

World builds massive walls around its cities. 

Vampires exist as sexy wet dreams until they want to digest someone. 

Terrorists drop the bombs; humans hide behind their walls, and their sexy vampire buddies join them because food. 

Then the humans and the vampires team up to kill the zombies? 

Seems legit. 

I'm possibly in. I'll sub this and keep an eye on things.