What are some interesting storylines in Goku x Android 21 fanfiction?

Another storyline could be a time - travel one. Android 21 somehow gets sent back in time and meets a younger Goku. This would be really interesting as she would have knowledge of future events and technologies. Goku, being his curious self, would be intrigued by her and want to learn from her. They could team up to prevent some of the future disasters that Android 21 knows about.

One idea could be that Goku and Android 21 team up to face a new and extremely powerful villain. This villain could be from another dimension and has the power to corrupt the minds of other fighters. Goku, with his pure heart and Android 21's intelligence, find a way to defeat the villain.

Maybe in a post - battle scenario, Goku and Android 18 are left alone to recover. They begin to have conversations about their different origins. Goku shares about his Saiyan heritage and training, while Android 18 talks about her creation by Dr. Gero. This exchange could lead to a deeper emotional connection between them.

One interesting storyline could be about Naruto having a different power origin. For example, instead of being the host of the Nine - Tails, he might gain his power from an ancient sage. This could change the whole dynamic of his character development and relationships in the story.

One popular Goku x Android 18 fanfic could be 'A New Bond'. In this fic, it might explore how Goku and Android 18, who are from different origins, start to develop a unique relationship. It could show their interactions and how they gradually understand each other on a deeper level.

One possible storyline could be them teaming up for a tournament. Gohan's martial arts skills combined with 18's strength would make for an interesting duo in the fighting arena. They could face various opponents and learn to trust each other's abilities more.

Often, it could be new villains created specifically for the fanfiction. Maybe a powerful android created by the same scientist who made Android 21 but with a more evil intent.

One interesting storyline could be about the baby having unique powers inherited from both Goku and Bulma. For example, the baby might have Goku's strength but also Bulma's intelligence, leading to some comical and heroic situations as it grows up.

One interesting storyline could be Goku and Chichi going on a unique adventure together that tests their relationship in new ways. For example, they might have to face a new enemy that specifically targets their love for each other.

Another storyline could be centered around family secrets. What if there was a long - hidden connection between Goku's Saiyan heritage and some part of Bulma's family history? This could lead to a journey of discovery for both families as they uncover the truth. It might involve ancient prophecies, lost artifacts, and of course, some intense battles to protect the newfound knowledge.