No what I meant was, is that if the Deamon prince was a placeholder for an actual chaos god, e.g. an emobodiment of Khorne of Nurlge itself it would be too powerful but if thats not the case then jolly good. A Chaos Reaver/Warlord sounds cool. I belive the ones in the "Dead sky, Black sun" had more melee weapons and a lot of demonic/chaos powers about them rather than simply being machines of war, it was almost like they were alive (probably were, only with demons rather than machine sentience).
Its a shame the Deamon prince is completly removed, it would be a nice extra relic or higher tier unit still, since its voice and words it speaks were especially iconic of chaos and added great immersion for me at least. The "I have ascended" or "they are gnats before me!" still give me chills, perhaps you can use the voice sound files if you dont want to use the unit?
I was simply playing with the idea that you could some how copy the Dark Elder Soul resource and add it to Chaos. Then label the resource according to the God its for, not sure if thats even possible, I would assume some of these things are hard coded however were you interested in implementing such an idea.