One key element is Daken's relationship with his father, Wolverine. It's a source of conflict and motivation for him. Another is his dark nature, which sets him apart from the typical hero. His healing factor and claws are also important elements as they are his main means of combat.
The Dark Wolverine story often involves the complex character of Daken, Wolverine's son. Daken has a troubled past. He inherits some of Wolverine's abilities like the healing factor and the claws. He has his own moral struggles, often teetering on the edge between good and evil. His story is filled with action and his relationships, especially with his father, are quite strained.
A common theme is rivalry. Since both Daken and Bullseye are complex and often antagonistic characters in the Marvel universe, their fanfiction often plays on their natural competitiveness. Another theme is redemption. There could be stories where one or both of them are seeking redemption and their relationship helps or hinders that process.
One great place to start looking for Daken x Bullseye fanfiction is Archive of Our Own (AO3). There are various stories there with different themes and plotlines. Some might focus on their complex relationship in a more action - packed setting, where they could be enemies - turned - allies or vice versa. Another option could be Fanfiction.net, though the selection might be a bit more limited compared to AO3.
In 'Wolverine Origins', Logan's wife was Kayla Silverfox. Her story is one of love and tragedy. She was a mutant with the ability to manipulate others' minds. She was sent by Stryker to get close to Logan. However, she truly fell in love with him. Eventually, she was killed by Stryker as part of his plan to manipulate Logan further, which was a great loss for Logan and a turning point in his character development.
One main event is his discovery of his mutant powers at a young age. This changes his life forever. Another is his encounter with Sabretooth, which is a long - standing and complex relationship. Also, the adamantium bonding to his skeleton was a huge event in his story.
Wolverine's origin story is quite fascinating. He was born with a mutant ability to rapidly heal from any wound. His real name is James Howlett. His early life was filled with tragedy, which led him on a path of self - discovery and survival. He has a skeleton laced with adamantium, which makes him extremely tough in combat.
In Wolverine Origins, Logan's wife was Silver Fox. She was a mutant with the ability to manipulate the emotions of others. Her story was intertwined with Logan's. She was a key figure in his life, but unfortunately, she faced many hardships and ultimately met a tragic end at the hands of their enemies.
Thor would be an interesting character to pair with Wolverine. Thor's god - like powers and Wolverine's tenacity would make for some epic battles. They could also have some great conversations about honor and sacrifice, coming from their very different backgrounds.