I've had this theory ever since I first saw hero factory, and now that I'm up to date on it, I am even more intrigued. My theory is this: Hero Factory and Bionicle are both set in the same universe. Seem far fetched? Well here is the story line I've worked out. It is well known that the great beings survived past the destruction of Spherus Magna as there are some whom are still alive in the Bionicle cannon, what I think is that when Spherus Magna broke apart, one great being decided to leave the galaxy all together and create a new world for himself. This isn't too hard to imagine as great beings have free will and cirtainly have the intellect. That beings name was Akiyama Makuro, the founder of the hero factory and, to quote HS01, "[T]he oldest known robot in the galaxy." There he found the same substance used by the great beings on Spherus Magna to create what the Matoran would call Toa Stones, but what he called Quaza. He found that you didn't have to use the quaza to transform a small, simple biomachanical creature into a larger, more powerful one, but you could use cylindrical cores of quaza to fuel robotic husks and give them life, sentience and, in it's pure form, a powerful will to do justice. So, just like a Toa, but without, as of yet, the ability to fully harness elemental and mask powers. So, I have no idea if this is something that Lego is actually doing, but it seems to fit in quite well, if there are any holes in the theory, let me know and I'll try to address them.