User blog comment:Maki Kuronami/Lesson 24: Why the Naming Rule of Remnant Exists/@comment-25436196-20140926023017/@comment-4010415-20140926053851

The next WoR will most likely be about Aura, to be honest. They said in the RWBY livestream that one of the WoR videos is about Aura. I'm hoping that'll extend to Semblance, though.

Maybe the fourth WoR (which will be DVD/Bluray exclusive) will be about Grimm.