I think I have the lore, figured a bit. The timeline is Kingdom of passion -> Town of passion -> Zombie's retreat 1 -> Zombies Retreat 2. Town of passion shows that the power ( ares one ) stone is lost to time and space and i believe kingdom of passion will show what perspired with ares and the prince. The stone is found by the doctors in zombie's retreat one and is unleashed upon camp zomi. The stone has been told by the lust goddess ( forgot her name ) that it is more powerful and devastating than the lust stone and could destroy kingdoms. Now it shows in Zombies retreat 1 and 2. I think this is how it goes.