What should be added to the top five from the previous installments?

Coming up with a concept isn't a problem (it's already done), but the characteristics, heroes, overall appearance, and so on – that's where you need to brainstorm, figure things out, and, most importantly, ensure the balance is right. And I wasn't suggesting combining them. I came up with a good idea with the Minoans. Regarding the power beneath the ground, yes. P.S. Sorry for the slight off-topic.