Given how damned pissed I'm going to be if we don't get Primal summoning... I like to think we might get a victory for the Light side, resulting in a flood of Light, which we then combat by summoning Primals for shits and giggles... Hydealyn becomes an unstoppable force that would destroy everything without Zodiarks opposition, but we can just pop an Ifrit and drain Her now limitless source of aether to delay the inevitable. A flood of Light from a being we know has a serious leech problem isn't all that threatening, come to think of it...