I would like to see Mannoroth the pit demon in HoTS, think he would bring something unique and cool to the nexus.
If you’re gonna make a suggestion of a hero, you should include your own ideas to it. Otherwise it will likely never happen.
YES! If they can bring down Deathwing to be playable they can also make Archimonde or Kil Jaeden and many of more powerful big boys from the lore. Not Sargeras tho that would be too much.