The Dan Yang mentioned in the Romance of the Three Kingdoms referred to the country established by Zhang Bao, the younger sister of Zhang Jiao, the leader of the Yellow Turban Uprising at the end of the Eastern Han Dynasty. After Zhang Jiao's death, his son Zhang Liang succeeded to the throne but was soon defeated by Han officials.
Danyang in the Three Kingdoms Era referred to Anyue County, Ziyang City, Sichuan Province, which was located in the middle of the Sichuan Basin about 80 kilometers away from Chongqing. Anyue County was located on the border between the Three Kingdoms Shu Han and the Three Kingdoms Wei. It was one of the important battlefields in the history of the Three Kingdoms and also one of the important origins of Shu Han. During the Three Kingdoms period, Anyue County was an important political, economic, and cultural center of Shu Han. Today, Anyue County still retained many cultural and historical relics of the Three Kingdoms, such as the Shuhan Culture theme park and the Three Kingdoms City. It was a tourist attraction that integrated culture, history, and tourism.
The character of Aku could be developed in a 'pregnant Aku in Samurai Jack fanfiction' by exploring how he interacts with the world around him differently. He may become more reclusive as he doesn't want others to see his 'weak' state. Or he could become more aggressive in trying to protect his pregnancy, which would be a new aspect of his character. Also, his relationship with his own power might change. Maybe he has to find new ways to use his magic that don't harm the unborn, which would force him to grow and adapt in ways he hasn't before.
One idea could be a crossover where Aku accidentally opens a portal to the Naruto universe. Naruto, being the curious and brave ninja he is, decides to explore Aku's world. They could start off as enemies, but gradually come to understand each other's motives and end up teaming up against a greater evil that threatens both of their worlds.
Well,'sinopsis' might refer to a synopsis in Indonesian. 'Bahagia' means happy. 'Bukan' is 'not' and 'bidaan' could be something like a show or performance. So perhaps it means that a happy synopsis is not for a novel. But it's a bit unclear without more context.