Actually, I have a theory why we haven't received news about the matoran. I call it: The return if the Mctoran. Think about it. Original bionicle had no matoran originally (I think), just Turaga and Toa. Here, we have Toa and "defenders". No Matoran in sight. So, where do the Matoran come in? McDonalds. They worked well Tue first time, why not a second time for the Mctoran? And since the plots are basically the same (firstly finding masks and fighting Rahi, then Bohrok, then finally finding legendary mask), it would technically work. I think. Man, that looked so much better in my head. :|