Kara Danvers (Supergirl) is also very popular. Her superpowers and kind - hearted nature make her a central figure. Fans love to see her interact with the more grounded characters from Arrow, like when she tries to understand their more human problems despite her god - like powers.
Well, obviously Superman and Supergirl are the most central characters. But other popular characters often include Lex Luthor. He is always a great antagonist, constantly devising new plans to take down the Kryptonians. His intelligence and deviousness add a lot of tension to the stories.
Well, obviously the Flash and Arrow themselves are very popular. Their dynamic, with the Flash's light - heartedness and super - speed contrasted with Arrow's brooding and combat skills, is really appealing. But also, characters like Felicity Smoak are often popular. She's smart and has great chemistry with both heroes, so she often plays an important role in fanfictions.
One interesting crossover could be the characters teaming up to fight a common supervillain. For example, Lex Luthor from Supergirl's world could team up with some of Arrow's villains like Deathstroke, and Team Arrow and Supergirl would have to combine their skills to take them down.
Supergirl would be really interesting. Her alien origin and her super strength, along with her ability to fly, would make her stand out. She could bring a new dynamic to Team Flash with her different set of powers and her more idealistic view of heroism, which might contrast with some of the more street - level concerns of Team Flash.
Oliver Queen is definitely one of the most popular. He's the main character in the show, so in fanfiction, people love to explore different aspects of his character, like his time on the island or his relationships. Felicity Smoak is also very popular. Her intelligence and her relationship with Oliver are often the focus. Another popular character is Diggle. He's Oliver's right - hand man, and fans like to write about his loyalty and his own backstory.
The Flash (Barry Allen) could also be a great character to include. Since he has crossovers with both Arrow and Supergirl in the actual shows. His light - hearted nature and super - speed abilities could add a different dynamic to the story. He could act as a mediator between Oliver and Kara when they have differences. Also, villains like Lex Luthor could be really interesting to explore in this crossover. His brilliant mind and devious plans could pose a significant threat to both heroes and force them to work together in new ways.
Obviously, The Flash and Supergirl themselves are very popular. Their unique powers and personalities make them central to most fanfictions.
Well, obviously Supergirl and The Flash themselves are very popular. They are the main characters in their respective shows and fans love to write about them in different scenarios. Also, villains like Reverse - Flash are often popular in fanfiction as they add a lot of conflict.
Another great storyline could involve a cross - dimensional rift that brings characters from Arrow's world into Supergirl's and vice versa. This would create a lot of chaos as the characters have to adapt to the different rules and environments. For example, Oliver might struggle with the presence of aliens in Supergirl's world, while Kara has to deal with the more gritty and crime - ridden Star City. It could also lead to some interesting character pair - ups and new friendships or rivalries.
The main protagonist from the original 'the black arrow' is likely to be very popular in the fanfiction as well. Their heroic deeds and journey are often the focus.