I know that no one will read that but I feel need to write it.
I've thought about that and I've found somenthing strange. If you win mission 12, where you fought last time against purple opponent, you can see animation in which is someone, who looks like barbarian chieftan more than like Moorbach, who was teacher of Lothar, taken to the king's tent. And in the briefing to mission 9 is said that only two of barbarian leaders should win against you (I hope it's same in the English version, cause I have czech translation in game). I have an idea: The purple with minimap color set to 20 (the purple from missions 5-7) is Johann von Moorbach and the second purple with minimap color 232 (missions 9-12) can be barbarian chieftan. I also found that in mission 5 data file under the player's 1 (blue) starting script is writen that:
SET_MAP_COLOR 231
SET_NEW_REMAP 104 105 106 107 108 109 110 111
It isn't valid, because there are no !'s, but if you will write them there, blue opponent will have the same colour like the green ones, which are unknown. Maybe the green one is Moorbach!
If you win mission 15 (last mission with greens) you will see animation of fight between two warriors. I didn't know what can it mean, but it can be fight between Moorbach (?green) and you (king's leader)
Yes, maybe I used so much imagination, but it goes together. If you look on the map, you'll see that the green one first appears in mission 12 and disappears in mission 15 and if you will imagine line which will connect all flags of missions where he is, you'll see land, which he owns and there will be posiblity, that he can be in mission 5, cause it was very near his land, maybe inside it!
PS: Please excuse my english, I cannot speak that language very well.
PPS: If you think it's stupid idea, say it. But it is the best I found
AvB