1 makuta banisheed matanui
2makuta was lazy split himself in 7 the rakishi and himself
3they desrtoed things
4matanui split him self in 8 himself the toa and somthing else
5the 8 part never formed a toa but a mask
6 the mask finally formed and sent a surge of light every where
7the light banished the rakishi
8 it fixed all and erased the minds of all not completly only the rakishi
9the rahi were each protcting the capsules of the rakishi
10 the toa fought makuta at a weaker form
11during the borok sagas makuta was gaining power
12he gained the true form of power
13 and afrter the bk saga makuta will unleash the rakishi
14matanui wanted to help he also gained power and made the vahis
15the toa will fight him
thats my thiery please reply im 11 and it took foreverer to type this

people please don't spam
good theorie, the splitting thing, but if the Toa are all part Mata-Nui, then what happened to the original Mata-nui?

Not entirely true, as we know the Vahi will be used to battle the Bohrok-Kal.

It could be that mata-nui is all the toa, and that his mind was erased and lay "dormant"(key word) in the toa's minds the seventh toa might be the last peice to mata-nui puzzle!
-Hottoco

mata nui became a sliver of life and possiably formed a matoran

Maybe only a small part of Mata-Nui wakes up to become the ToL..
the theory's pretty good, but I'm not too sure about Makuta splittling up into the Rahkshi..

it kinda makes sense that he would split up into the rahkshi..cuz he kinda did it before,when he was supposedly like every enemy??