So much of the Edward and Jacob fanfiction I've read really leans into the idea that their rivalry isn't just about Bella, you know? It becomes this foundational tension that writers use to build everything from outright enemies-to-lovers AUs to these incredibly nuanced bromances. I keep seeing stories where the supernatural elements are almost secondary to the push-pull of their dynamic—a vampire who embodies control and a werewolf who's all about raw, protective passion.
What hooks me is when authors dig into the pack mentality versus the Cullen coven loyalty. Jacob's connection to his tribe and his brothers creates a different kind of obligation than Edward's self-imposed exile and family ties. Stories that shift the focus away from the love triangle and have them actually working together against a common threat, or getting stuck in some situation where they're forced to rely on each other, often end up highlighting a weird, grudging respect. The friendship that sometimes emerges feels earned, not cheap, because it's built on acknowledging their fundamental differences rather than erasing them.
A lot of fanfic also plays with the age gap in a way the original material only hints at—Edward's century of existence versus Jacob's accelerated maturation. I've read a few where Edward acts as this weary mentor figure to a Jacob who's struggling with his new identity, which flips the rivalry on its head completely. The physicality of their conflict in the books gets translated into other kinds of intensity in fic, sometimes romantic, sometimes just deeply competitive in a way that feels almost sports-like. You get these endless descriptions of them running through the forest, not to fight, but just to see who's faster, and it's so oddly pure.
My favorite trope, though, has to be when Bella is out of the picture entirely, either deceased or just not the focus, and the story becomes about these two guys navigating the weird supernatural politics of Forks on their own. The friendship versions often have them bonding over shared protectiveness for other characters, like Renesmee or the other pack members, and it ends up feeling more authentic than a lot of the canon material.