Given we've had wind/air (Breath) and water (Tears), I think we should have fire next. Would also fit the Triforce colour scheme of green (wind/courage), blue (water/wisdom) and red (fire/power). I like the contrast between Wild and Kingdom, but I'm not sure what the third would be. Nature, civilization, maybe gods? Idk.
Breath of the Wild
Tears of the Kingdom
Flame of the Heavens
Edit - Gods doesn't fit because the Wild and the Kingdom are places, so maybe heaven instead? But that would fit more with the sky islands idea who knows