As you may know, or not know, sometimes Japanese animation adapts american sucesses be it movies, comics or series and transform them into a anime, their next "victim" is the surnatural Supernatural serie.
Basically it's the story of two brothers who're "chasing" surnatural phenomenons accross the United States, so basically it means we'll see witches, vampires, ghosts and their friends, not as interesting as Japanese Yokai but still very interesting to me, I will definitely watch (and I need to watch the original serie as well, but I say that for years ^^)
Little is known about the animation in itself except it'll have 22 episodes and will start next January, the trailer doesn't show much either but we'll probably get some more as time goes.
Now enjoy said trailer.