The void lords, and why they are so much more dangerous than the Burning Legion

The void Lords

The void lords of the Warcraft Universe have only recently been introduced as a concept via the World of Warcraft: Chronicle Volume 1 novel by Blizzard Entertainment, but the way they are described Makes me think that they are, and have always been, the most formidable and dangerous force the cosmos has ever known. The Burning Legion kind of happened, to try to stop these guys from eating everything in existence. An example of their direct influence on Azeroth would be the infamous old god infestation that even almost got the planet 're-originated' or however Algalon put it. The old gods were originally minor manifestations of the Void lords, sent to scour the universe for nascent world souls to corrupt. The void lords themselves were limited in their ability to effect the physical universe and thus sent these horrific old gods to do their bidding in the farthest reaches of existence.

Why the void lords are a bigger problem than the Burning Legion:

The ultimate goal of the void lords is to consume all things that exist, I'm not kidding. Its very simple but infinity terrifying all the same, these immense beings who are, by the way, so powerful and immense in size that in order to manifest into full form in the  physical universe, where Azeroth is, they would have to consume all the matter and energy of entire solar systems just to maintain a presence. This, it seems, is the goal of these guys. Now when I say they want to eat everything I do mean everything, including Sargeras all of the demons and the twisting nether itself..... So where the demons just wanna blow everything up, the void lords want to eat it all.... 

I'm not trying to defend the burning legion or anything. But I think the void is something that is a little more formidable than anything from the legion that we've seen. I think the only thing I could compare a Void God to in real life is a Black Hole right here on earth.... 

So what do you think? Am I just kinda blowing smoke? Or is the Warcraft universes' main villain been something we haven't even known exists yet?