Ahh yes, pieces. The majority of Bionicle parts are discontinued by now, so that's a definite no. I think they'll use a mixture of HF parts and new parts as well. I for one hope that they would use more technic, not so much so it's just super-complicated (The majority of Bionicle titans), but not so little (most HF sets). Also, have some sort of gear function to make those kind of people happy too