When does Soul Eater return?

Soul Eater is a Japanese manga series written and illustrated by Atsushi Ohkubo. Set at the "Death Weapon Meister Academy", the series revolves around three teams, each consisting of a weapon meister and at least one human that can transform into a weapon. They must collect the souls of 99 evil humans and one witch, in that order; otherwise, they will have to start all over again. The series has spawned a drama CD, an art book, and three video games.