Perhaps a plotline where she is in a race with another super - fast being from a different galaxy. This race could be for a valuable resource or to save a planet. Her speed would be put to the test as she tries to outperform her competitor. Or, there could be a plot where she has to quickly gather information from different parts of the universe using her speed before an evil force takes over.
One possible plotline could be that Captain Marvel has to race against time to stop a powerful weapon from detonating. Her speed would be crucial in reaching the weapon's location before it's too late. Another could be that she uses her speed to outrun and outwit an enemy who has some sort of time - based powers.
One common plotline is them teaming up against a powerful, world - threatening villain. This villain could be from outer space or a super - powered human on Earth. Another plotline could be a power - swapping scenario, where they accidentally or intentionally exchange their powers and have to adapt to the new abilities.
Well, it could be a good fanfic. If Captain Marvel's speed is a central and well - developed aspect in the story. For example, the author might show how her speed gives her an edge in battles or helps her save the day more quickly. It also depends on how the rest of the story elements, like the plot and character development, tie in with this speed aspect.
Fanfic writers often draw inspiration from the relationships between characters. Captain Marvel doesn't have as many pre - established and well - loved relationships within the superhero universe as some other characters. For example, the bromance between Thor and Hulk or the complex relationship between Batman and Joker in DC. Without these kinds of engaging relationships to build on, it might be less appealing for writers to include her in their fanfics.
A different plot could be set in a post - Endgame world. Valkyrie is ruling Asgard and Captain Marvel is still out in space protecting galaxies. One day, a strange energy signal draws Captain Marvel to Asgard. Valkyrie is initially cautious but soon realizes they can work together to figure out the source of the signal. As they work together, they discover new aspects of each other and their relationship blossoms against the backdrop of a rebuilding Asgard and a changing universe.
One idea could be a time - travel fanfic where Captain Marvel and Captain America team up in a different era. Maybe they end up in the 1920s and have to deal with a Hydra - like threat that's starting to form early. Another could be a fanfic where they swap powers for a day and have to learn to adapt to each other's abilities. For example, Captain America trying to control Captain Marvel's photon blasts and Captain Marvel having to rely on just her combat skills like Cap usually does.
She could meet a very smart science teacher who is intrigued by her powers and wants to study them scientifically.
One common theme is self - discovery. Captain Marvel is often on a journey to understand more about her powers and her place in the universe. For example, in many fanfics she might go to a new planet and learn something new about herself through the experiences there.
Perhaps there is a common enemy that forces Captain America and the RWBY characters to work together. This enemy could be a powerful being that has the ability to manipulate both the technology in Captain America's world and the Dust in RWBY's world. The combined forces of the two universes would have to find a way to defeat this enemy and in the process, learn from each other's strengths and weaknesses.
Well, it's hard to say who the 'best' is as it depends on personal taste. But some popular authors in the fanfic community often include those who have a deep understanding of the characters. For example, 'MarvelFan45' has written some really engaging stories that explore the relationship between Captain Marvel and Captain America in different scenarios. Their writing style is very descriptive, making you feel like you're right there with the characters.
A common theme is female empowerment. Both Captain Marvel and Valkyrie are strong female characters. Fanfics often explore how they use their power and influence to make a difference. For example, they might fight against a patriarchal villain or system.