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What was the fucking point of web of shadows arc? Everything was settled after the initial metru nui arc. The matoran are all sent to mata nui, and the toa age into turaga.
It only exists for toys and a movie. Nothing plot relevant was advanced. The only question answered might be "why can't they go back to metru nui?" But by that time they were already going to mata nui.
Even then the toys weren't good. They were just excuses to put spinners on bionicles.
