Denathrius says he’s coming to claim what was his in the first place. The robot has a strange orb in her chest. Zovaal has a hole in his where that orb obviously once was. They call him, especially the winter queen calls him, a monster. But I’m sure that’s because he was opposed to using souls to fuel the desires of his eternal brothers and sisters. So they used their combined power to banish him wihch has filled that hole with a desire for vengeance. It’s gonna turn out his idea, what the shadowlands were like when he was leader, is the way they were always meant to be and the eternals screwed it all up once the first ones were gone.