Yes, there are quite a few. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Naruto has a dragon bloodline' and you'll find a variety of stories. Some might focus on how Naruto discovers his dragon bloodline, while others could explore the new powers it gives him and how it changes his relationships with other characters in the Naruto universe.
There are also fanfictions where a bloodline is created through some sort of experimental jutsu. For example, a bloodline that allows the user to transform into different elements at will. This would give the character an edge in combat as they could adapt to any situation by changing their form.
In some fanfictions, one of the bloodline limits could be something like a super-enhanced Sharingan-like ability. Another might be a power related to controlling natural elements in a unique way, for example, a more powerful form of water control. And perhaps a bloodline limit that gives Naruto the ability to instantly teleport short distances. However, different fanfictions can have very different interpretations of these six bloodline limits.
In these fanfics, a typical plot point is the transformation aspect. Naruto may transform into a more dragon - like form when using his full power. This transformation not only gives him more physical strength but also new jutsu - like abilities. Another common plot point is the training arc. He has to learn how to control his dragon bloodline powers, which is often difficult as they are so powerful. Sometimes, his dragon bloodline also attracts the attention of other powerful entities in the Naruto world, either those who want to use him or those who see him as a threat, which leads to various conflicts and plot developments.
On the other hand, the Dragon Bloodline could also create some jealousy or tension. If the character starts getting a lot of attention because of their unique bloodline, Anko might feel a bit left out. However, as the story progresses, they could work through these feelings and develop a stronger, more equal relationship.
Well, in a Naruto fanfiction with an ancient bloodline for Naruto, he could end up having a completely different path in his ninja journey. The ancient bloodline might attract the attention of other powerful entities, either good or bad. For instance, some ancient organizations might try to recruit him, seeing his potential. On the other hand, villains could target him more aggressively to prevent him from reaching his full potential. His training would also be different. Instead of the traditional ninja training, he might have to go through some ancient and secretive training methods related to his bloodline. This could involve meditating in special places or performing rituals that are long forgotten in the ninja world.
Well, Naruto is a must - have main character. He might be the one who unlocks the dragon slayer bloodline's true potential. Hinata could be another main character, her Byakugan ability might interact in interesting ways with the dragon slayer powers. There could also be a mysterious character who is an elder of the dragon slayer bloodline clan. This character could hold the key to understanding the bloodline's history and secrets, and thus be an important main character in the fanfiction.
Well, if there are extremely powerful bloodline abilities in fanfiction, it can tip the power balance. For instance, if a new bloodline allows instant teleportation across long distances without any chakra cost, it would make battles and missions very different. It could make some characters overly dominant and change the strategic landscape of the Naruto world.
The wolf bloodline can make Naruto more independent. Since wolves are often seen as lone hunters, Naruto might start to rely more on his own instincts and abilities. This could change his relationship with his teammates as he takes on a more self - sufficient role.
One interesting concept could be the combination of Naruto's ninja abilities with the dragon slayer powers. For example, Naruto might use his shadow clones in unique ways when fighting alongside dragon slayer - like attacks. Another concept could be the origin of the dragon slayer bloodline in the Naruto universe. It could be tied to some ancient and forgotten clan. Also, the way the characters interact with dragons in this fanfiction can be really cool, like forming alliances or having epic battles against them.