Maybe a character from True Blood, like Sookie, could travel to Forks. Her faerie abilities would be quite a novelty in the Twilight setting. The Cullens might be intrigued by her powers and her connection to the supernatural in a different way than they are used to. This could lead to all sorts of interactions, from alliances to rivalries.
The vampires in Twilight are often more reserved and struggle with their inner 'humanity' more than those in True Blood. So, a character like Carlisle from Twilight might try to teach some of the True Blood vampires about self - control. In return, a True Blood vampire like Eric could show Carlisle how to be more assertive in the vampire world.
Perhaps a love triangle could be created in the crossover fanfiction. A female character from 'Twilight' could fall in love with a vampire from 'True Blood' while also having feelings for a character from her own world. This would create a complex web of relationships and loyalties, and the different vampire abilities and cultures from both series would add depth to the story.
One idea could be a vampire from True Blood visiting Forks from Twilight and causing chaos among the Cullen family. Maybe they have different views on how to co - exist with humans and it leads to a big conflict.
Eric Northman and Edward Cullen would be an interesting pairing. Eric is a bold and often ruthless vampire in True Blood, while Edward is more brooding and conflicted in Twilight. Their different personalities would create a lot of tension.
Another interesting pairing could be Alice Cullen and Sookie Stackhouse. Alice has her visions of the future, and Sookie has her mind - reading ability. They could team up to solve some mystery that involves both the 'Twilight' and 'True Blood' worlds. Maybe they could use their powers to prevent a war between the two different vampire factions.
Another concept could be a plot where a powerful dark wizard from the Harry Potter world teams up with the vampires in True Blood to take over both the wizarding world and the vampire - human world. This would force Harry Potter and his friends to team up with some of the True Blood characters, like Sookie Stackhouse, to stop the evil alliance.
One idea could be a crossover with 'The Vampire Diaries'. Picture Damon Salvatore showing up in Bon Temps and getting into a power struggle with some of the True Blood vampires. It would be full of drama and vampire politics.
Archive of Our Own (AO3) is also a great place. It has a well - organized tagging system. So, if you search for 'True Blood' and then look for related crossover tags, you're likely to find some high - quality fanfictions. Plus, the community there is quite active and often leaves useful comments.
Well, perhaps in this fanfiction, the True Blood virus spreads to the Naruto universe. The Hidden Villages have to deal with the sudden appearance of vampires. Naruto, being the hero, tries to find a cure. He teams up with some of the True Blood characters who have knowledge about the virus. Along the way, there are battles against vampire ninjas who have turned evil due to the virus.