One possibility could be that Naruto discovers his Meiton bloodline during a particularly dangerous mission. This new power gives him the ability to manipulate dark matter or something equally as mysterious. He might initially struggle to control it, but as the story progresses, he learns to use it for good, perhaps to combat an even greater evil that the normal ninja techniques can't handle.
His confidence would likely increase. Having a unique and powerful bloodline like Meiton would give Naruto an edge, and he'd know it. He'd be more self - assured in his battles, knowing he has this special ability. For example, he might not be as hesitant to take on stronger opponents.
Naruto's confidence also takes a different turn. He is no longer just relying on his regular jutsu. With Meiton, he has a new sense of power, but also new responsibilities. He might be more cautious in battles, knowing that his Meiton attacks could have far - reaching consequences. In some fanfictions, this makes him seem more mature as he weighs his actions more carefully.
A lesser - known but really interesting 'Naruto has Meiton' fanfiction focuses on how Naruto uses Meiton in combination with his shadow clones. He creates clones with Meiton - enhanced abilities, which makes for some really cool battle scenes and strategic maneuvers.
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.
One interesting idea could be the unique and powerful jutsu that can be created with the Meiton Release. For example, a character might develop a Meiton jutsu that can nullify other ninjutsu on contact, adding a new dynamic to battles. Another idea could be the origin of the Meiton Release. Maybe it was an ancient and lost art that a character discovers and has to master, facing many challenges along the way.
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.
Well, one implication could be enhanced physical abilities. Dragons are often seen as strong and powerful creatures in many mythologies. So Naruto might have greater strength, speed, and endurance. He could also have some sort of elemental control related to dragons, like breathing fire or manipulating wind in a more dragon - like way. Maybe he could even fly in some forms, as dragons are known for their flight ability.
Sasuke is often involved. Given his natural inclination towards power and his Sharingan, it's easy to imagine him exploring the Meiton Release. His quest for power could lead him to discover and master this dark release. Another one is Naruto himself. Fans might write about Naruto learning Meiton Release to add a new dimension to his already vast arsenal of jutsu, perhaps as a way to face an even stronger enemy.
Yes, there might be some out there. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Naruto has Hulk bloodline' and you might find some interesting stories.