What are some interesting plot ideas for a 'Batman v Superman: Dawn of Justice' fanfic?

A plot in the fanfiction could be about Lois Lane being the key to preventing the fight. She discovers a secret that proves both Batman and Superman are being used in a political game, and she has to convince them to trust each other. In this way, it would add more depth to her character as more than just a damsel in distress. For example, she could use her journalistic skills to uncover the truth behind the forces trying to pit the two heroes against each other.

One idea could be that Batman discovers a new Kryptonian weapon that Superman unknowingly has a weakness to. This weapon was hidden on Earth long ago by a rogue Kryptonian. Batman then has to decide whether to use this knowledge to defeat Superman or find a way to help Superman overcome this potential threat together.

One idea could be a story where Batman and Superman have to team up against a common enemy before their big fight actually happens. Maybe a powerful alien threat that forces them to realize they need each other's skills.

One of the main plot points is the conflict between Batman and Superman. Batman sees Superman as a potential threat to humanity. Also, Lex Luthor plays a major role in fueling this conflict, manipulating events from behind the scenes. Another important aspect is the introduction of Wonder Woman, who has her own interests and agenda within the story.

Batman is quite interesting. His determination to take on Superman, despite the obvious power imbalance, shows his tenacity. And Superman himself is also interesting, as he struggles with being both a hero and an object of fear. Wonder Woman is another, with her mysterious past and her own motives for getting involved.

One idea could be that a powerful new villain emerges who has the ability to manipulate both Batman and Superman's minds. This forces them to fight against each other while the real enemy is pulling the strings. Another could be a situation where Gotham and Metropolis are in a territorial dispute, and Batman and Superman initially take sides based on their cities, but then realize they've been played.

Batman and Superman are obviously very popular. They are the main focus of the original movie, so in fanfiction, they often take center stage. Writers love to explore their complex relationship, whether it's a friendship, rivalry, or a combination of both.

Mercy Graves is an underrated character. In a fanfic, she could be developed more as a complex character. Maybe she has her own motives for being involved in Lex Luthor's schemes. She could be the one who has a change of heart and tries to stop Luthor from pitting Batman and Superman against each other, adding a new layer of intrigue to the story.

A cool plot could be that a powerful alien race arrives on Earth and offers a deal to the world leaders. Batman is suspicious of their motives and starts investigating. Superman, on the other hand, is more open - minded at first. This causes a rift between them. As Batman uncovers more evidence of the aliens' true intentions, he has to convince Superman. In the end, they join forces to stop the aliens from taking over the Earth.

Perhaps Batman has teamed up with some of Superman's other foes who have knowledge of his weaknesses. For example, Lex Luthor could provide Batman with technology or information that gives him the edge. Also, Batman might use psychological warfare on Superman, playing on his insecurities about being an alien among humans.