I'm sure the devs would take issue with us beating the Nameless, as much as Pip deserves it. So, not this expansion.
SO, it seems xpac development begins about 2 years out. Your post won't even matter for years now, but nice try.
There are 2 sides to this conflict. The shadow guys claim Mayong stole their plane. The blood guys call the shadow guys invaders. Both sides are ready to attack us so maybe they're both bad guys. In the end we supported Mayong by closing the gate. I still have no idea why, except thats what was required for the mission.
Maybe next time we'll get Khati sha and Emperor. Keep the old luclin bane weapons in the bank for the Emp!
There have been a couple of other instances where Mayong wasn't the bad guy, and did help the player. Though I do not think that he is intend to be seen as making us think he is good. He is more like a Lex Luthor or Thanos, who will help stop something that will end both them and the universe while at the same time use it to advance their own schemes.