A common theme is redemption. The Black Mercy is often seen as a tool of evil, but in some fanfics, it gets a chance at redemption. Another theme is the power of the mind. Since the Black Mercy attacks mentally, Wonder Woman's mental fortitude is explored a great deal.
One great 'Wonder Woman Black Mercy' fanfiction is 'The Mercy's Hold'. It delves into how Wonder Woman battles the psychological grip of the Black Mercy. The writer does an amazing job of portraying Wonder Woman's inner strength and her struggle to break free.
A fanfiction idea could involve Wonder Woman visiting Wakanda. She is amazed by the advanced technology and the unique culture. Black Panther shows her around and they start to exchange ideas about leadership and protecting their respective peoples. Then an outside threat arrives, perhaps in the form of a group of villains who want to steal Wakanda's vibranium. Together, they fight off the invaders and in the process, Wonder Woman and Black Panther become good friends and allies.
They could form an alliance when their worlds are invaded by a common enemy from another dimension. Black Panther uses his tactical mind and Wakandan resources while Wonder Woman uses her combat skills. Result? A badass team - up against the invaders.
One common theme is female empowerment. Both Wonder Woman and Black Widow are strong female characters, and in fanfiction, they often team up to show the power of women working together. They break gender norms and prove that they can be just as capable, if not more, than male superheroes.
A common theme is female empowerment. Since both are strong female characters, the fanfictions often highlight their power and independence. For example, in many stories, they break gender norms and take on challenges that are typically thought of as male - dominated.
Romance can also be a theme, although not as common as the others. When it is, it usually shows a relationship that is based on mutual respect and admiration. The fanfictions might explore how they balance their heroic duties with their relationship. It's an interesting take as they are both very independent characters. Also, the theme of sisterhood is present in some works, emphasizing their bond as strong female superheroes in a male - dominated world of superheroes.
For Wonder Woman, you could explore her adapting to a more modern world in the fanfiction. Maybe she has to deal with new technologies and social norms that are different from her homeland. For Black Widow, you could show her past traumas affecting her actions in new ways. For example, her experiences in the Red Room could resurface when she's in a high - pressure situation with Wonder Woman.
Batman could be a likely candidate to save Wonder Woman. He has a long history of dealing with the Joker and his antics. His detective skills would help him track down where the Joker is keeping Wonder Woman.