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The idea was meant to eventually become a game. Basic level setup: Enter a new area; get caught up in area-specific plot. Boss battle at the end earns you the plate. First few levels seem pretty basic and repetitive; get the flow of things before the plot picks up. Mewtwo would confront you at around the third/fourth level to get that rolling, and there was an idea that even earlier on the player would see a cutscene once you’ve left an area showing the boss you just beat being attacked by some mysterious creature (Deoxys).
Of course, there's still a lot of work that needs to be done before we can start thinking about things like that.