Well, it could be that they are trapped in a never - ending loop of bad events. For example, every time they seem to solve a problem, like saving a city from a disaster, it resets and they have to do it all over again, but with more difficult challenges each time. And in this nightmare, the stress of constantly repeating these events starts to put a strain on their relationship. Kara might start to feel like Lena is blaming her for not being able to break the loop, and Lena could feel like Kara isn't trying hard enough.
One possible scenario could be Kara losing her powers in the nightmare and being unable to protect Lena from some unknown threat. Another might be Lena turning against Kara due to some false information in the dream world.
One great 'kara danvers x lena luthor fanfic' is 'Supercorp Hearts'. It has a really engaging plot that delves deep into their relationship. The characterizations are on point, making it feel like an extension of the show.
It can be portrayed as full of mistrust. In the nightmare, they might constantly suspect each other of having ulterior motives. For example, Kara might think Lena is secretly working with her enemies, and Lena might think Kara is hiding something important from her.
One great 'kara danvers x lena luthor fanfiction' is 'Red Kryptonite and the Luthor Heiress'. It has an interesting plot where Kara's exposure to red kryptonite leads to some unexpected interactions with Lena. The characterizations are really well - done, making it a must - read for fans of this pairing.
You can find them on Archive of Our Own (AO3). It has a vast collection of fanfics, and there are many great 'kara danvers x lena luthor' ones there.
I really like 'Lena and Kara: A New Beginning'. In this fanfic, the author delves into their backstories and how those shape their present interactions. It also has an interesting plot where they have to work together to save their city from a new threat. It's full of action and emotional moments.
There's also 'Heartbeats in Harmony'. In this fanfiction, Kara and Lena face a common enemy that forces them to rely on each other even more. The story is filled with action scenes and at the same time, the development of their relationship is at the forefront. It's a great read for fans of the two characters.
One possible fanfiction could be about Lena Luthor becoming a mentor to young Kara Danvers. Lena, with her intelligence and resources, could help Kara understand the complex world around her while also learning to control her powers better. Maybe Lena discovers Kara's identity early on and decides to guide her in secret, away from the prying eyes of Lex Luthor and other potential threats.
One possible scenario in such a fanfiction could be that Kara gets physically hurt during a fight against a powerful enemy while Lena is desperately trying to find a way to save her. Maybe Lena uses her scientific knowledge to develop a new device that can heal Kara's injuries. This would show the deep bond between them as Lena risks everything to save Kara.
Well, for one thing, the two characters are very different yet complementary. Kara is all about hope and justice, while Lena has her own moral code despite her family name. In fanfiction, writers can play with these traits, like having Lena help Kara in unexpected ways or Kara being the one to show Lena a different path. Also, their relationship has a lot of emotional depth that fans love to explore in different scenarios.
Kara and Lena are both strong, interesting characters on their own. Kara is Supergirl, with her powers and moral compass, and Lena is a brilliant scientist and businesswoman. When you put them together in a fanfiction, especially in a romantic context as in the 'lemon' genre, it creates a really appealing combination. Fans are drawn to seeing how their powers and personalities interact, and how they might overcome obstacles in a relationship. It's also about the exploration of the 'forbidden' or 'taboo' nature of their relationship in some cases, which adds to the allure.