Let's be honest with ourselves: chances are we'd all play this Warcraft fighting game mocked up by Redditor GuardianReflex. And while this game isn't a reality, we can always hope that Blizzard will one day allow us to do to participate in an epic battle in which Varian gets to punch Sylvannas in the face (or vice versa). And if this epic, Blizzard vs. Capcom style battle isn't possible, perhaps a pet battle in which we control tiny faction leaders?
But since we aren't likely to see this in actual game any time soon, GuardianReflex is making more mockups based on user requests. We have Thrall vs. Garrosh behind the cut and hope to see more soon!