Yes, there are such fanfictions. In the 'Twilight' series, Bella's pregnancy was a very dangerous situation. Some fanfiction writers explore the idea of her not surviving childbirth as a different take on the story, adding more drama and exploring different character reactions.
Bella might go into a deep depression. She was so in love with Edward, and his death could shatter her world. She could become withdrawn and isolate herself from her friends and family.
There's also 'A World Without Bella'. In this fanfic, her death causes a ripple effect. For example, the Cullens might re - evaluate their place in Forks and the relationships they've built. It could also show how Jacob's pack reacts, perhaps leading to some unexpected alliances or conflicts in the fight against other supernatural threats.
One common plot element is the extreme grief of Edward. He might lose control or go into a deep depression. Another is how the Cullens deal with the loss and the potential blame they might place on themselves. Also, the future of Renesmee without her mother could be explored.
Another way is to follow Twilight fanfiction groups on social media platforms like Facebook or Reddit. People in these groups often share and discuss their favorite fanfictions. You can post a request asking for 'Bella Dies' fanfictions. Some fans might have their own personal blogs or websites dedicated to Twilight fanfiction and could have some unique 'Bella Dies' stories.
Another theme is the change in relationships. For example, the relationship between the vampires and the werewolves might shift because of Bella's death. In some fanfictions, they come together in a new way to deal with the aftermath.
Yes, there are some out there. You can start by looking on popular fanfiction websites like Fanfiction.net or Archive of Our Own. Just search for 'Twilight Bella is a werecat' and you'll likely find a variety of stories with different takes on the concept.
In 'Saving Bella' fanfiction, it might involve a unique take on rescuing Bella from various perils. Maybe it's a different vampire or werewolf who steps in to save her from a danger that the original story didn't cover. For example, it could be a new character who has a special power or knowledge that enables them to keep Bella safe from a hidden threat in Forks.
In some fanfictions, Jacob and Bella's pregnancy can take on various plotlines. One possibility is that it creates a huge rift between the werewolf pack and the Cullens. Jacob's loyalty to Bella is tested as he tries to protect her and their unborn child from the potential threats in the Twilight world, like the Volturi. This situation often leads to a lot of drama and tension in the fan - created stories.