One popular theme is the two heroes teaming up against a common enemy. Maybe a supervillain that's causing chaos in both Gotham and the world Captain America protects. Another theme is a clash of ideologies at first, as Batman is more of a vigilante with his own set of rules, while Captain America follows a more patriotic and military - inspired code.
Time - travel is also a common theme. For instance, Captain America being sent to Gotham in the past or Batman somehow ending up in Captain America's era. It allows for interesting interactions and comparisons between the two different worlds they come from. And of course, there's the theme of friendship developing between the two very different heroes.
Some fanfictions might focus on Captain America's internal struggles. They could delve deeper into his sense of duty and how it conflicts with his personal desires. For instance, how he copes with the modern world's values that sometimes clash with his more old - fashioned beliefs.
One common theme is the contrast between their ideologies. Batman is more of a lone vigilante with a darker view of justice, while Captain America is a symbol of patriotism and upholds a more idealistic view. Fanfics often explore how they bridge this gap.
In some fanfictions, the writers might explore what would happen if Batman was given the super - soldier serum. How would his already formidable skills be enhanced? And how would Captain America react to this new version of Batman? It could lead to some really interesting character dynamics and storylines.
One idea could be a crossover where Batman and Captain America team up to take on a common enemy like a powerful alien threat. They could combine their unique skills, with Batman's detective skills and gadgets and Captain America's combat expertise and leadership.
Well, in some fanfiction, they might compete in a series of challenges. For example, a test of physical strength, strategic thinking, and moral integrity. Captain America, with his super - soldier serum - enhanced abilities, would be a formidable opponent for Batman, who relies on his gadgets and martial arts skills. This could lead to an intense back - and - forth as they try to outdo each other.
Some of the well - liked Captain America fanfictions focus on his early days. Maybe his training before becoming Captain America, how he interacted with the military personnel at that time. And then there are those that pair him with other Avengers in unique team - up stories that weren't shown in the movies. For instance, a story where he and Black Widow have to go on a secret mission together and how they learn to trust each other more deeply.
There are also fanfictions that explore her role as a symbol. How she represents hope and justice in the Avengers world, not just as a fighter but also as an inspiration for others, especially young girls who look up to her.
Some fanfics in this genre might focus on the comical reactions of Captain America. Since he is often seen as a very stoic and serious character, the contrast of him being ticklish and having uncontrollable laughter can be a great source of amusement. This can also be used to show his adaptability to new and unexpected situations, which is an important trait for a superhero.
One popular trope is the 'love across time'. Since Captain America was frozen for decades, there are often stories where he has to navigate a relationship with a modern - day character, dealing with the differences in values and culture between his time and now.
For Batman, you could explore his past more deeply. Maybe in the fanfiction, he has a new revelation about his parents' death that changes his perspective. With Captain America, you could focus on how he adapts to the modern world in different ways than shown in the movies.