Kinda... been watching Breaking Bad... :P
Will we ever get to deal in illegal substances and other trades in TW games... especially TW TK. Chinese lore has always been about honour, integrity, filial piety and strength, which is why they have always held a place in my heart and I hold great respect for the Chinese for that.
However... I've always wanted to see illegal activities put in a Total War game. The shadow realm and the light realm always intertwine within all nations and empires... and truth be told, an empire cannot exist without them, though of course empires usually just make them legal, until it suits them otherwise... but I'd like to be able to hold monopolies in such things, that could potentially provide certain "faction" buffs when you have access to (or control) them.
The Black Market Arms Trade.
While weapons are not exactly... controlled to a great extent in the old days, I think there should be a way for a state (or an entity within the state) to construct and sell weapons to either encourage crime, rebellion, or political power. political parties should have a stockpile of weapons, supplies, money, etc.. in order to protect from or attack their political enemies... as is the case in real life. Perhaps If I were playing Zheng Jiang and didn't have the military power to openly oppose the Han Empire... I could send weapons to political groups, secret/crime societies or even just arm the peasants through a steady supply of weapons and supplies, that could help them rebel against the empire, making it easier for me campaign against them.
The Opium Trade.
As we saw with the British Empire, flooding opium from India into Qing China, to thoroughly weaken the Chinese population, economy and government, so much that no one was properly able to resist invasion and occupation... and those that did resist, were beaten back easily and had little support, due to the rampant corruption and drug zombies.
We could see a similar thing in TW: TK... where Opium and other drugs can be smuggled through to provinces and distributed, exacting the same level of influence and destruction that the British did to Qing China. Perhaps if we managed to distribute said drugs into a province, we could severely weaken the economy and government of that province, undermining their authority and increasing internal corruption, so much that we could bribe potential officials and military officers, or even cause massive revolts though mass starvation, destruction of production and employment or even just extreme poverty.
Slavery... of all types...
Slavery is by far, one of the oldest involuntary professions in the world and throughout mankind's existence... only in the 1800s did it finally get abolished... officially... None the less, I think it would be lovely to have this as a potential monopoly in a Three Kingdoms (or a future TW) game. Slavery has it's uses... labour manpower, domesticate servitude, gladiators/athletics or even just meat bags to feed captured animals, like tigers and wolves
Brothels are an establishment where males and females are contracted (or enslaved) to provide certain... activities in return for a payment. In TK Three Kingdoms, we could see this, rather on the governmental side... Taxable business profits, while adding public order bonuses, maybe even a bit of population growth.
Piracy and "Stolen" cargo
This one should definitely be a thing! especially for the state of Wu, that had plenty of infamous pirate rabble, raiding fishing villages and fighting on the coasts and rivers. It would be nice to establish "pirate coves" similar to what we have in TW Warhammer 2, except without all the squid things and zombies. It could also funnel into the other trades... transporting weapons, drugs and even slaves! Perhaps piracy could give a bonus income (or production rate) to the other "black market" trades.
Raiding and stealing cargo from other nations could be a great economic idea... after all, it worked for the Ottoman Empire and their famous Pirate King, Hayreddin Barbarossa. In TW TK, we could see a coastal state, like Dong Wu raid neighbouring states, plundering their trade routes and bringing back their resources and perhaps some faction income or other economic bonuses.
"I am the punishment of Tengri, if you had not sinned, he would not have sent me against you." - Chenghis Khan Temujin