Sorry this is so massively overdue, but it's time for a new topic:
Who do you think is the Great Being?
As revealed in The Yesterday Quest, one citizen of the Matoran Universe is a Great Being in disguise. Read the latest chapter on BIONICLEStory.com to find out more.
I think it's Velika. He speaks in riddles, he has a unique view of the world, he is an inventor, and most importantly he is Greg Farshtey's favourite Matoran!