Bionicle: The Mask of Light was a Miramax film. In it, Takua subverted Judeo-Christian archeotypes by representing both "Elijah" and "The Messiah".
Takua became Takanuva and after he became Takanuva, he saved Mata Nui and probably also Mata Nui by going underground and merging with Makuta Teridax and then killing himself in his weakness. If Makuta represents sin and death, then this is like Takanuva creating salvation in the depths of the Earth by becoming sin for the Matoran and trampling down death by death. After this, Takanuva came back to life, but not Makuta, even though he is kind of invincible, so the latter probably just lost his corporeal form like Sauron did at the beginning of the Third Age.