Are you someone who enjoyes the more "mystical" points of Bionicle? Perhaps these modifications of the story might appeal to you!
.There is no Mata Nui robot; Mata Nui remains more of a deity
.Bara Magna is a continent, not a planet
.When Teridax takes over the "universe" he strips Mata Nui of his power and exiles Mata Nui and the Ignika to Bara Magna
.In the final battle (Mata Nui vs. Makuta) the magnitude of the battle raises a landmass from under the ocean that connects bara magna and Mata Nui (the island)
.Teridax and the other Makuta are spirits and therefore cannot be "killed" in every sense of the word.
Any questions? Just ask