I recently heard of this new manga called Blue Exorcist. I read part of the first book in the may issue of Shonen Jump. And now the anime is out~!
The world of Blue Exorcist consists of two dimensions joined as one, like a mirror. The first is the world in which the humans live, Assiah. The other is the world of demons, Gehenna. Ordinarily, travel between the two, and indeed any kind of contact between the two, is impossible. However the demons can pass over into this world by possessing anything that exists within it.
The main charater is Rin Okumura, he's fifteen years old, and he's the devil's son. After killing Rin's guardian Father Fujimoto in an attempt to bring Rin back to the Demon world, it led to Rin's journey on becoming an Exorcist in order to defeat his father.
And since its produced by Viz media it's likely it's going to be popular like BLEACH, NARUTO, and D.Gray-man.
And Soul Eater too aparently~ ^^