Well, in fanfiction, their honeymoon can be a time of magic and wonder. Some stories might have them encountering new supernatural elements during this time. For example, they could discover a hidden power or a special place that only they can access because of their unique vampire - human bond. It's all about exploring the possibilities that the original story left open, and their honeymoon is a great time for that in fanfiction.
Also, some fanfictions might introduce new characters unique to the story. But overall, it's Bella and Edward's honeymoon, so they are the ones that drive the story forward. Their different natures, with Bella being mortal and Edward being immortal, create a lot of interesting dynamics during their honeymoon time, like how they deal with Bella's mortality and their future together.
Another plot idea could be that Bella starts to have strange dreams during the honeymoon. These dreams seem to be prophetic, showing her glimpses of their future together and some potential threats. Edward tries to comfort her and figure out what these dreams mean, which could lead to a deeper exploration of their relationship and the Twilight world.
Perhaps in the fanfic, they have encounters with local supernatural beings that are unique to the honeymoon location. This could add an element of mystery and adventure to their time together. For example, they might meet a friendly spirit that gives them advice about their future as a couple.
The appeal lies in seeing more of Bella and Edward's relationship. Fans love their love story, and the honeymoon is a very special time for them. It's a chance to see them in a more private, romantic setting.
Edward and Bella are the main characters. Edward, with his super strength, speed, and ability to read minds (except Bella's). Bella, who is now Edward's wife, is known for her strong will and her deep love for Edward. In the fanfiction about their honeymoon, we see how they interact and build their new life together as a married couple.
There are several authors who have made a mark in this area. One author I've heard of is Jane Doe (not a real name, just an example). She has a way of writing Bella's character development during the honeymoon in a very believable way. Another could be John Smith, who is great at creating romantic and tense moments between Bella and Edward. However, it really depends on personal taste as different people look for different things in fanfiction.
Love and romance are very common themes. The honeymoon is a time for Edward and Bella to further explore their deep love for each other. They often have tender and passionate moments.
One interesting plot could be their exploration of a new, mysterious island during their honeymoon. They might discover hidden caves with ancient secrets.