A possible plot could also be that Lois gets kidnapped by one of Superman's enemies who wants to use her as bait to lure Superman out. Clark, with the help of Batman (after some initial mistrust between them), has to rescue Lois. This situation could lead to a deeper understanding and respect between Batman and Superman as they work together towards a common goal, and also strengthen the bond between Clark and Lois.
One interesting plot could be Clark and Lois working together to expose a conspiracy in Gotham that involves both Superman and Batman. Maybe they discover that a powerful criminal organization is trying to pit the two heroes against each other for their own gain. They use Lois' investigative skills and Clark's powers to gather evidence and try to bring peace between the two vigilantes.
Their relationship might develop through shared experiences. For example, when they are both investigating a mystery in Metropolis. Clark uses his super - powers subtly to help Lois get to the bottom of the story, and in the process, they grow closer. As they face danger together, they start to rely on each other more and more, which deepens their connection.
One example could be a story where a female Clark fan uses her admiration for him to inspire others in Metropolis. She might start a movement of positive change, like promoting Clark's values of truth and justice on a grassroots level. This could involve her writing articles or giving speeches about the symbol that Superman represents.
One interesting plot could be that Batman and Lois Lane team up to solve a mystery that involves both Gotham and Metropolis. Maybe a new villain is creating chaos in both cities, and their combined skills are needed to stop it. Batman's detective skills and Lois's journalistic instincts would make for an exciting adventure.
One possible plot could be the challenges they face in their daily lives while keeping Superman's identity a secret even within their marriage. For example, Lois might have to deal with the media constantly speculating about Superman's personal life and she has to be careful not to let any hints slip.
One interesting plot could be Batman and Superman having to team up against a common enemy that is more powerful than either of them alone. This forces them to put aside their differences and combine their skills.
One idea could be that Naruto is somehow transported to the DC universe. He teams up with Batman against Superman who has been mind - controlled. Naruto uses his Rasengan and shadow clone jutsu to help Batman outwit Superman's super strength. Another plot could involve a tournament where Naruto, Batman, and Superman all compete, with Naruto's ninja skills being a wild card in the mix.
The female character can be developed by giving her a backstory related to Clark. For instance, if she grew up in a rough part of Metropolis and Superman's actions made her believe in hope, that could shape her personality. She could be strong - willed and determined to support Clark in any way she can.
One interesting plot could be that Batman and Catwoman are forced to team up against a greater threat in the fanfiction. Maybe a new supervillain emerges who is more powerful than any they've faced before, and they have to put aside their differences to save Gotham.
One idea could be that Batman and Superman are forced to team up against a common enemy from another dimension. This enemy has the power to manipulate the minds of the citizens of Metropolis and Gotham, making them turn on their heroes. Batman uses his detective skills to find the source of the mind control, while Superman has to hold off the hordes of brainwashed civilians.
One idea could be an OC who has the power to nullify Superman's powers temporarily, making the fight more evenly matched against Batman. This OC could be a scientist who has developed a special device after years of studying Kryptonian physiology.