Shouldn't Sylvanas have raised Lord Blackthorn way long ago?
For those who don't know him, he's a very minor character in Warcraft 3 Frozen Throne
He led a group of bandits to pillage Lordaeron and they got caught in the middle of the skirmish between Sylvanas and Varimathras. He was possessed by Sylvanas' banshees (or charmed by her if you manage to get her to level 6) and then being mind controlled, he led his men to follow Sylvanas and charged towards Varimathras
The Mercenary Camps in the chapter were orange, greatly implying that the Blackthorn Bandits were from Alterac, and some novels/books (maybe Warcraft RPG? But even if it's no longer canon, no other source denounces this otherwise) claim that the surviving Alteraci managed to loot Lordaeron while it was infested with the Scourge and the Legion. Also, the generic Bandit Lord's model was a brown/orange reskin of an Alliance Knight, reinforcing the Alteraci origin,
Now the point is: wouldn't he be an important enough figure to be raised back by Sylvanas as a high ranking Executor or Commander? He could have been a prominent Forsaken way more than Belmont. There's not even any hint of his current whereabouts. At least his ogre counterpart Mug'thol had a closure way back in Classic. Or maybe he could be a pretext for Alteraci Humans in the Horde?