Skoll Shorties

Random thought - What'll happen if/when Tyrande and Malfurion learn of the events that take place in the Lost Honor cinematic?

What if the next expansion is setting up for four different factions like Warcraft 3 had? This of course being rather hard given the current times but would be interesting for a narrative of having a divided factions of Alliance and Horde while also faced with the Black Empire.

I can see the night warriors breaking into their own sub faction but not something that's playable. That gives the story much more flexibility as opposed to making them a player faction, forcing fairness where it wouldn't normally seem necessary.