If you ask me, Lego has been using their favorite elements (not the super power kind) from Bionicle because it was so popular, so newer fans who don't know what Bionicle is would get interested easier. It worked before, right? Only now it's on a newer generation. On another note I believe Lego split bionicle into 2 themes: Hero Factory and Ninjago. HF's job was to take the Robotic side of things, Ninjago was for the mystic, elemental powers, and collecting shiny golden stuff (Weapons = Kanohi) to beat an evil shadow associated dark dude with a staff. Just my opinion here. I'm not saying this is true, I'm saying this is what I think.