If/when the Dogs of War are added to the game, Aranessa Saltspite should be made into a Dogs of War legendary lord instead of a Vampire Coast one. I know that she wasn’t part of the Dogs of War, but I think that makes more sense than having her be part of the Vampire Coast; she’s not a vampire or even undead. She should be the pirate queen of the Old World, so in addition to the Dogs of War roster, I think that the Pirates of Sartosa faction should also keep access to her Sartosan units, the ogre maneaters, and even the Vampire Coast roster (at least a limited roster, but preferably the full one). As the pirate queen, pirates and mercenaries should be flocking to her for an opportunity for their share of the treasure, living or dead. However, any Pirates of Sartosa army must have either a Vampire Fleet Admiral lord or a Vampire Fleet Captain hero (the only Vampire Coast lord and hero they should have) in it before it can recruit Vampire Coast units into it. This is similar how for the Warriors of Chaos, there really needs to be a lord or hero of the same Chaos God for there to be those monogod units in the army.
If CA actually does this, then they should also have a new Vampire Coast legendary lord to replace Aranessa Saltspite. If they can make up one new legendary lord for the Vampire Coast (Cylostra Direfin), then they can make up another new one. I have an idea for that.
A new Vampire Coast legendary lord would have a great start in Grand Cathay. There are many ports there just waiting to have Pirate Coves established in them.
CA could take inspiration from the real-life Chinese pirate queen from the early 19th century, Zheng Yi Sao, to make a new Vampire Coast legendary lord who is a jade-blooded vampire.
I have a backstory for her (feel free to use or modify it, CA!): Warhammer Zheng Yi Sao (whatever they decide to call her) in life was a beautiful noblewoman and the wife of a wealthy Cathayan noble who owned a large fleet of merchant ships which she helped run. They were both beloved by the crews of the merchant ships because they were paid and fed very well and treated kindly by them. But there were other people who hated them: Other Cathayan nobles who were their competitors in the Cathayan merchant shipping industry. These other nobles hired assassins to murder her and her husband. She barely managed to escape with her life, but her husband was not so lucky and was killed. Having inherited her husband’s merchant fleet, she swore revenge, swearing that she would kill all of the nobles behind her husband’s murder. She and her loyal crews converted their merchant ships for piracy and attacked and captured the ships of her husband’s rivals, as well as capturing and killing the rival nobles when they could. They eventually amassed a large pirate fleet and became a serious thorn in the side of Grand Cathay’s sea trade. The Grand Cathayan imperial authorities declared her and her pirates to be outlaws and sent squadrons from the Jade Fleet to destroy them. While she had many ships under her command, they were no match for the Jade Fleet. Engagement after engagement, her once impressive fleet was reduced to just a handful of ships. In the last battle, she was gravely wounded. She and her remaining fleet occupied a small port and brought her ashore for help. Despite everyones’ best efforts, her wounds couldn’t be healed; she was going to die. Having heard of her plight and her beauty, a jade-blooded vampire came to her one night and made her an offer: He could save her from death if she would be his bride as a vampire. Out of desperation, she agreed, and the vampire gave her the blood kiss, transforming her into a vampire. However, she had no intention of being the jade-blooded vampire’s bride, so she slew him as soon as she had the opportunity. She and her remaining crews went to the sites of the previous battles and raised the fallen pirates and Jade Fleet sailors from the depths, who she then used to raise her pirate and the Jade Fleet sunken ships and repaired them. Now she has a massive fleet crewed by mostly undead pirates and sailors led by herself and other jade-blooded vampires who were drawn by her success, hoping for their share of the plunder. She is now dead-set on not only eliminating the surviving nobles, but destroying the Jade Fleet and bringing Grand Cathay to its knees.
This can either be part of a DLC or FLC, as I don’t know what other units could be brought in for Vampire Coast. Some living Cathayan pirates just for her faction maybe, like Aranessa Saltspite’s living Sartosan units. She can either lead the Dead Flag Fleet, a current minor Vampire Coast faction already in the game, or lead a new faction. Either way, she should start on the coast of Grand Cathay somewhere south of where Lokhir Fellheart currently starts. She can have some campaign mechanics or missions where she has to sack or raze particular port cities where these rival nobles are centered and also have to fight off the Jade Fleet which comes to attack her from the sea every once in a while. When her armies are sailing at sea, the ships used to represent them on the map should look like tattered Grand Cathay ships rather than regular Vampire Coast ships.