A plot could involve Athelstan getting kidnapped by an enemy tribe. Ragnar then launches a rescue mission. During the rescue, Ragnar realizes just how important Athelstan is to him, not just as a friend but also as someone who has opened his eyes to new ideas. After the rescue, their friendship reaches a new level.
Perhaps a story where Athelstan is teaching Ragnar about Christianity in more detail. Ragnar starts to question some of his own Norse beliefs. This causes a stir among the other Vikings, but Ragnar and Athelstan stand by each other. They have to find a way to balance the two different belief systems within the Viking community.
One idea could be a story where Ragnar and Athelstan go on a journey together to a far - off land. They face various challenges like harsh weather and wild animals. Along the way, they have deep conversations about their different beliefs and cultures, which strengthen their bond.
One interesting fanfiction could be about their first meeting from Athelstan's perspective. He's a monk in a new land filled with Vikings, and his encounter with Ragnar is both terrifying and fascinating. It could explore his inner turmoil as he tries to understand these new people while holding onto his faith.
Highlight their shared experiences. They've both been through a lot together, like raids and encounters with different cultures. Write about how these experiences have shaped their relationship. For instance, when they first met a new tribe, they both had to rely on each other's skills - Ragnar's fighting skills and Athelstan's diplomatic skills to get out of a tricky situation.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, and you can easily search for Ragnar and Athelstan fanfiction there. Just type in their names in the search bar, and you'll get a list of relevant stories.
Another plot could revolve around the characters having premonitions of the events that are going to occur in the quarry. They then have to decide whether to trust these visions and how to act upon them. This could add a whole new layer of suspense and mystery to the story.
One idea could be a time - travel plot. The Backyardigans accidentally find a magical object in the backyard that sends them to different eras in history. They could have to work together to find their way back home while also learning about the different time periods. For example, they might end up in the prehistoric era and have to deal with dinosaurs.
One idea could be a story where one of the dalmatian puppies gets lost during a family outing and has to find its way back home, facing various challenges along the way.
One idea could be exploring the backstory of a minor character in the Bioshock universe. For example, a splicer's journey before they became spliced. It could show how they were once an ordinary citizen of Rapture and what led them to make the fateful decision to use ADAM. Another plot could focus on an alternate timeline where the protagonist makes different choices. Maybe they side with the wrong faction and have to deal with the consequences. A third idea is a story centered around a new type of plasmid that has unexpected effects on the user and how it impacts the power dynamics in Rapture.
Another plot could involve the creation of a female monster. In the original, Victor Frankenstein was hesitant to create a female. A fanfic could explore what would happen if he did. Maybe the two monsters would have a complex relationship, and together they would try to find a place in the world that would accept them.
One idea could be that Batman and Wonder Woman team up to stop an ancient, otherworldly threat that's beyond the capabilities of the Justice League alone. They have to travel to different dimensions and rely on each other's unique skills.
A heatwaves fanfic could center around a young couple. The heatwave makes their living situation difficult, like their apartment has no air conditioning. They have to find creative ways to cool off and in the process, their relationship deepens. They could also get involved in community efforts to help those more affected by the heatwave, such as the elderly or the homeless.