One interesting plot could be that they team up to take on a new and powerful villain in Gotham. Maybe this villain has some unique powers that force Batman and Nightwing to combine their skills in unexpected ways.
Another possible plot is that they have a disagreement about how to handle a crime situation in Gotham. Batman might want to use his more traditional, stealthy approach, while Nightwing wants to be more open and involve the public more. This conflict could lead to a lot of character development for both of them as they try to find a middle ground.
Another possible plot is that they discover a long - lost secret about Gotham's past together. This could lead them on a journey through the city's underbelly and old, forgotten places, uncovering clues and facing challenges along the way.
One possible plot could be that there's a misunderstanding. Maybe Batman has been mind - controlled and he hits Nightwing without realizing it. Nightwing then has to figure out how to break the control on Batman while also dealing with his own feelings of betrayal.
The theme of family also runs strong. The Bat - family is complex, and when Nightwing and Batman meet, it can highlight the family aspect. They might have disagreements like any family members, but ultimately they are there for each other. This is seen in fanfictions where they protect each other from threats both external and internal to the family.
I'm not sure who the absolute best is, but some popular ones might be those who have a deep understanding of the Batman and Nightwing characters. Maybe authors who have been following the comics for a long time.
A cool plot could be that in the fanfiction, there is a meta - human who can manipulate time and space. Green Arrow and Batman get caught in one of his experiments and end up in an alternate dimension where they have to rely on each other's skills to get back home. Also, a plot where Green Arrow's family and Batman's allies are kidnapped by the same criminal organization. They must work together to rescue them all. Additionally, perhaps a plot where Green Arrow and Batman swap identities for a day as part of a bet or a mission gone wrong and hilarity and some deep insights into their characters ensue.
One great 'Nightwing meets Batman' fanfiction is 'The Reunion' on FanFiction.net. It has a really interesting plot where Nightwing and Batman have to team up to take down a new and dangerous criminal in Gotham. The author does a wonderful job of capturing their dynamic relationship.
The power dynamic. Batman is the mentor, but Nightwing has grown into his own hero. Their sparring shows the shift in their relationship. It's exciting to see how Nightwing can now hold his own against Batman.
Well, obviously Batman and Nightwing are the main characters. Batman, the dark and brooding protector of Gotham, with his vast array of gadgets and skills. And Nightwing, the acrobatic and more light - hearted hero who was once Robin.
One interesting story could be where the team is on a mission and Nightwing shows up unexpectedly to save the day. His acrobatic skills and strategic mind help the team overcome a powerful enemy. Another might involve Nightwing training the team, sharing his skills and experiences with them, which could lead to some great character development for the team members.
One interesting plot could be that they are in the middle of a battle against a powerful enemy. In the heat of the moment, Nightwing saves Raven from a near - fatal attack. Their eyes meet, and the adrenaline and unspoken feelings lead them to share a passionate kiss. This kiss could then be a turning point in their relationship, making them realize their deeper feelings for each other.