I'm not sure who Aku specifically is. Aku could be a person with a great imagination who tells all kinds of stories, like adventure stories, fairy tales or even true - life stories.
It could be someone from the Naruto universe who doesn't like Naruto's newfound fascination with Aku. For example, Danzo might see Naruto's interest in Aku as a threat to the stability of the village and try to stop Naruto from further exploring Aku - related things. So, Danzo could be the main antagonist in this case.
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.
As a fan of web novels, I don't have any knowledge about the plot and character settings of Star Travels. Therefore, he had no choice. It is recommended to read the original work or check the relevant background information to obtain more accurate information.
I'm not sure who specifically wrote the lyrics for a song titled 'lirik never ending story'. It could be written by the songwriter associated with a particular musical version of 'The Never Ending Story'.
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.
The key elements include advanced scientific concepts. These can range from teleportation to artificial intelligence. They add a sense of wonder and plausibility to the story. Characters are also crucial. They are often the ones who experience and react to the strange new world of science fiction. Their relationships, whether it's a friendship or a rivalry, shape the story. The plot typically has a high - stakes problem, like a looming alien invasion or a malfunctioning super - computer that could destroy the world. And the setting, which can be as vast as an entire galaxy or as small as a secret underground laboratory, provides the backdrop for all these elements to interact. For instance, in a story set on a spaceship, the confined space can create a sense of claustrophobia and tension as the characters deal with internal and external threats.