This is something that mainly came up to mind while looking up things about Vog and Vog's cubs'.
Basically, I was thinking, maybe we can get a danger Mission dedicated to these two, in which the description would be slightly like:
"We have received word that Vog is attempting an attack on Haven. His mercilous cubs are spreading the love and we need you to help Desna infiltrate the Vog's den, and stop him from destroying Haven."
Basically, it'll be a beast/fire mission, there will be Vog's cubs', The Entity of Vog, and an Ashtail version of the Perma-Frostifur.
This is obviously a mere suggestion, but I'd like to see your guys' feeding back on this.
Yaaaaaay! More fire! I just love the variety of our current endgame!
Anyway, you'll need way more details when suggesting a unique mission. General level layout per depth, enemies, story, monster formations and mechanics, etc.