One common theme is the clash of values. Captain America has his own set of moral and ethical beliefs from his own universe, and when he enters the world of Shield Hero, there can be differences and similarities that are explored. For example, how they both view justice and protecting the innocent.
One great 'Shield Hero Captain America fanfiction' could be 'The Shield of Two Worlds'. In this fic, Captain America somehow gets transported to the world of Shield Hero. He teams up with the Shield Hero, and they exchange combat techniques and strategies. It's really interesting to see how Cap's values and fighting style blend with the unique magic and combat system of the Shield Hero's world.
Well, perhaps in this fanfic, the values of Captain America from his own world collide with the somewhat different moral landscape of The Rising of the Shield Hero's world. He could try to reform some of the more unjust systems there. At the same time, he might learn new ways of combat from the Shield Hero, and they'd have to work through cultural differences while fighting common foes.
One common theme is the struggle to overcome physical injury. Captain America is often depicted as superhuman, but in these fanfictions, his human side shows through when he has to deal with pain and the process of healing.
One common theme is the clash of different ideologies. For example, when Captain America crosses over with a dystopian universe, his values of freedom and justice often conflict with the oppressive regimes there. Another theme is the exploration of friendship. When he meets characters from other franchises, they have to learn to trust and work together.
One common theme is the exploration of how Captain America deals with the unexpected situation of pregnancy. It could be about his struggle to balance his superhero duties with his newfound role as a potential father.
A common theme is empowerment. Since it's a female version of Captain America, the stories often focus on her breaking gender barriers and proving herself in a male - dominated superhero world. For example, she might have to fight against sexist villains or deal with male characters who underestimate her at first.
One common theme is loyalty. Their loyalty to each other is often a central part of the stories. They've been through so much together and would do anything for one another.
Another theme is loyalty. Many OC fanfictions explore the loyalty that the OC develops towards Captain America and his ideals. This can be tested in various situations, like when facing a powerful enemy or when having to make a difficult choice between different loyalties. It adds depth to the relationship between the OC and Captain America.
Family is a very common theme. Captain America, who has lost so much in his own life, often forms a new kind of family unit with the baby in these stories. Protection is also big, as he uses his skills to keep the baby safe from various threats.
One common theme is sacrifice. Captain America might have to sacrifice some of his superhero duties to take care of his pregnant partner. Another theme is protection. He will do everything to protect his partner and the unborn child from any threats. And there's also the theme of family values. It shows how important family is to him even in the middle of his superhero life.