Dean would probably be very protective. He's always been the big brother looking out for Sam, and with Sam as a kid, that instinct would be even stronger. He'd be constantly worried about Sam getting hurt and would keep him close at all times.
In fanfiction, if Sam was kidnapped, it could lead to a very intense story. Dean would surely go on a rampage to find him. Maybe Sam was kidnapped by a powerful demon who wants to use him for some dark ritual. It could also be a new, unknown enemy who has a vendetta against the Winchesters.
One great fanfiction where Sam dies is 'The End of the Road'. It's a really emotional piece that shows how the other characters deal with his loss. It delves deep into Dean's grief and how it changes him.
Fanfiction about Michael and Sam in 'Supernatural' often explores unique relationships. Some might focus on the power dynamics between the two, as Michael is an archangel and Sam has his own powers. Writers may also delve into the psychological aspects of how they interact with each other, given their complex characters in the original show.
In Supernatural fanfiction, Sam having cancer can be portrayed in various ways. Some authors might use it as a way to add more emotional depth to his character. They could show his struggle with the illness while still dealing with the supernatural threats. For example, he might be weaker physically but still determined to fight demons, which creates a contrast between his human vulnerability and his heroic side.
Yes, there are many. You can find them on popular fanfiction websites like Archive of Our Own. Some might focus on their relationship development, from how they first met to falling in love. There are also ones that explore their adventures together within the Supernatural universe.
One idea could be that Sam is kidnapped by a group of rogue hunters who think he's gone too far in his use of demon powers. They lock him in an abandoned bunker and try to 'exorcise' the 'demon' out of him, not realizing he's in control. His brother Dean has to race against time to find him, following a series of cryptic clues left by the kidnappers.
There's also 'A Hunter's Legacy'. It's set in an alternate universe where Dean and Sam face different challenges. The author does an amazing job of capturing their personalities. The story is full of twists and turns that keep you on the edge of your seat, and it really showcases the unique bond between the two brothers.
One great 'Supernatural' female Sam fanfiction is 'The Hunter's Daughter'. It has a really interesting plot where the female character interacts with Sam in a unique way. The story is full of mystery and adventure.
In most Supernatural Sam fanfiction, bestiality is not a common or acceptable theme. The Supernatural universe generally focuses on human relationships, the fight against the supernatural, and the bond between the characters like Sam and his brother Dean. Fanfiction writers usually adhere to the ethical and moral boundaries of the show's overall tone, so bestiality would be highly out of place and not likely to be part of a legitimate story.