Mewtwo's Final Form

This is what Serebii has to say about the newest CoroCoro scans: "Though it doesn't reveal anything new, CoroCoro also reveals the pieces about the new Pokémon revealed last week. In doing so, it confirms that it replaces Mewtwo on the movie poster and confirms that it is in fact a new form of Mewtwo, with the poster explanation stating that Mewtwo has awakened and become its new shape."