Umarak might become the new main villain instead of Makuta being the main for the whole series. Or maybe Makuta and Ekimu might team up (Unity) to defeat Umarak the Destroyer if he stole wearing the MoCo for himself.
It would be cool if we had many more main villains with different objectives.
Also I don’t doubt there would be a combination model of all the beasts. Maybe they will make a new villain. I’m thinking to far with this stuff aren’t I?
Actually now that I think about it, what if the beasts have the ability to combine with Umarak. Each beast will have a different model when combined with Umarak. Im not saying that they will unite like the Toa, the beasts will disassemble and attach all of their parts onto Umarak or change him into something else. For example, if Umarak combines with a beast that resembles a dragon or winged beast, Umarak will become a winged beast with large wings and a long tail. He might come with gigantic claws as his weapons.