In my opinion, Lena Luthor would be an interesting character to include. She has a complex personality and her scientific genius could be either an asset or a liability depending on her motives. And for Flash's team, Wally West. His speedster abilities would make for some exciting team - up action scenes with Flash and Supergirl.
Well, Cisco Ramon from The Flash would be a great addition. He could use his tech skills to create some new gadgets or figure out ways to counter the villains' powers. Also, Martian Manhunter from Supergirl's side. His shape - shifting and telepathic abilities would add a whole new dimension to the story.
Definitely, Cisco Ramon from Flash. He can add some tech - savvy humor and his ability to create new gadgets can be really useful in the crossover. For example, he could make a device that helps Supergirl deal with a new type of kryptonite - like threat.
One idea could be that a powerful villain threatens both their cities simultaneously. Supergirl and The Flash have to team up, and in the fanfiction, their different powers and personalities could lead to some interesting interactions. For example, Supergirl's strength and The Flash's speed could be combined in unique ways to defeat the villain.
A great moment could be when they first meet and realize how different yet similar their worlds are. Supergirl might be in awe of The Flash's speed, and The Flash could be impressed by Supergirl's strength. It's a moment of mutual respect that often sets the tone for the rest of the story.
One great Flash and Supergirl fanfiction is 'The Team -Up of Legends'. It shows an alternate universe where they have to work together against a powerful new villain. The story does a great job of portraying their different powers and how they complement each other in battle.
The characters would have a range of reactions. Barry (Flash) would probably be very protective. He's a hero who helps people, and Kara is his friend. He'd likely offer his speed and any resources he has to keep her safe. Kara's friends on Supergirl's side, like Alex, would be shocked at first but then become very supportive. They might start planning how to protect Kara and the baby from all the threats they face in their world.
If Barry kidnapped Supergirl in fanfiction, it could be a really interesting plot twist. Maybe Barry has been affected by some sort of red kryptonite - like substance that makes him act out of character. This would lead to a conflict between the Flash and Supergirl's friends and allies. They would be confused as to why Barry would do such a thing.
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.
A plot twist could be that a character from one of the shows, who seems to be a minor or unassuming figure, is actually a powerful being from the future sent to manipulate the events of the crossover. This person has been subtly guiding the actions of the heroes, and when the truth is revealed, it completely changes the heroes' perception of the events they've been through and who they can trust.
In this fanfic, the plot could be really interesting. Since it's a crossover, there could be a unique blend of the Supergirl and Flash universes. Kara's pregnancy might be a catalyst for a big change in the story. For example, it could lead to a new form of power or ability within Kara that is related to motherhood. Flash could be the one to first notice the changes in Kara's powers because of his quick thinking and observational skills. The story might also involve a race against time as they try to protect Kara and the unborn baby from a villain who wants to use the baby's potential powers for evil purposes.