A great fanfiction could be set in a post - Endgame world. Captain Marvel has been away for a long time and when she returns, she finds that Black Widow's sacrifice has left a big hole in the Avengers. She decides to honor Black Widow's memory by training a new generation of female heroes, inspired by Black Widow's skills and tenacity.
One idea could be that Captain Marvel and Black Widow are on a mission together to infiltrate a powerful and secretive organization. They have to rely on each other's unique skills, with Captain Marvel using her super strength and flight to get them in and out of tight spots, while Black Widow uses her espionage expertise to gather intel.
A great Black Widow fanfiction is one where she goes on a solo adventure to take down a secret organization that has ties to her past in the KGB. In this story, she uses her spy skills and combat abilities to outwit her enemies. Some fanfictions also focus on her friendship with Hawkeye. For example, a story about how they first met and trained together, which gives more depth to their on - screen relationship. And then there are those that rewrite her story in a different universe, where she has different powers or a different origin, which can be really fascinating.
A prevalent theme is also power dynamics. Captain Marvel has immense superpowers, while Black Widow is a highly - skilled human. Fanfictions often play with how these different power levels interact. For example, they might face a situation where Captain Marvel's powers are nullified, and Black Widow has to step up and protect her, reversing the expected dynamic. Additionally, redemption and self - discovery are themes. Both characters have complex pasts, and fanfictions can explore how they help each other come to terms with their past actions and grow as individuals.
One interesting fanfiction could be about them going on a secret mission together that wasn't shown in the movies. Maybe they have to infiltrate a high - security enemy base where they rely on each other's unique skills. Captain America's leadership and combat skills combined with Black Widow's espionage expertise would make for a really exciting story.
Well, in some fanfiction, Black Widow might be given a new mission that ties in with the events of Captain America 2 but takes her to a different location. This could lead to her encountering new enemies or allies. There could also be a fanfiction where she has a romantic sub - plot with a character not explored in the movie. For example, a fellow agent who she has to work closely with during the chaos of Captain America 2. And then there are those fanfictions that rewrite certain key scenes from Black Widow's perspective, showing her thought process and how she really felt during those intense moments.
One interesting story could be where they team up for a covert mission in a war - torn country. They have to rely on each other's skills, with Black Widow's stealth and espionage expertise and Captain America's leadership and combat skills. Their relationship deepens as they face numerous challenges together.
Another concept could be a time - travel fanfic. Black Widow somehow gets sent to a time when Captain Marvel was just starting out as a hero. Black Widow then has to train the younger Captain Marvel and help her unlock her full potential while also trying to find a way back to her own time.
A really interesting fanfiction idea could be a pre - Avenger days story. Black Widow is on a mission for SHIELD and Captain Marvel, who is relatively new to Earth, gets caught in the middle of it. Black Widow initially suspects Captain Marvel of being a threat. But as they interact more, they realize they have common goals. It could show their character development and how they could have potentially influenced each other's growth even before the big team - up in the Avengers.
There are fanfictions that focus on Captain Marvel's origin story but with a twist. Maybe in this version, she gets her powers from a different source than in the official story. It could explore how this new origin affects her personality and her relationships with other characters in the Marvel universe.
Maybe Captain Marvel loses her powers temporarily due to some sort of alien technology. Black Widow then has to protect her and find a way to get her powers back. But it turns out that the one behind the power loss is someone they both trusted, like a fellow Avenger who has been mind - controlled.