They mentioned the new storyline would be like the new Star Trek movies, right? And what happens in the nuTrek movies? A major disaster in the far future leads to time travel shenanigans and alteration of events. I propose a comprehensive theory taking into account three major facts: 1. The writers basically put up a neon sign saying time travel is involved. 2. When Makuta puts on the Mask of Ultimate Power, the ground begins to crack open. 3. Mata Nui's observation protocol always involved the formation of an artificial island. Conclusion: The new story takes place during a previous cycle in Mata Nui's mission. The Toa Mata are sent back from some point after the reformation of Spherus Magna and lose their memories due to a botched transit. This interference diverts events going forward, separating the new timeline.