Sir Vincent wrote:LEGO does not make new sets for themes...they never have and I hope they will not start...but having these sets as Legends is a whole different story...and what do you mean Dragon Master King and The Black Monarch? The King (or Queen for that matter) can be whoever you want...LEGO didn't have storylines for those sets...and I don't really like the official LEGO dragons...maybe if it's made of light blue and standard blue bricks...
My guess is that the dragon master king is the guy with the cape and with one blue leg and one black leg, and one blue sleeve and one black sleeve.
As for the black monarch, my guess is that the name of the set "black monarch's ghost" implies either that the black monarch IS the ghost, or that he OWNS the ghost.
If he IS the ghost, then I assume that the knight visiting him is his heir. Considering that it was that knight in particular who was given the first plate-armor piece and functional visor armet helmet...it makes him special. Therefore, he is the king.
If he OWNS the ghost, then it is that knight in particular who is checking up on the ghost that he owns, which makes him the black monarch.