One challenge could be controlling the transformations. If he can't master when and how to transform, it could put him in dangerous situations. For example, transforming at the wrong time during a battle could leave him vulnerable.
Well, with the Omnitrix bloodline, Naruto might gain the ability to transform into various alien forms. This could enhance his physical strength, speed, and even give him new jutsu - like an alien form might have unique energy blasts. His combat style would become more diverse, and he could surprise his opponents in new ways.
Naruto himself is often very popular. Since it's related to his world, fans like to see how he would interact with the Omnitrix and its powers. He could use it in his journey to become Hokage, or to protect his friends in new and exciting ways.
In 'naruto omnitrix bloodline fanfiction', a cool concept might be the exploration of different bloodlines through the Omnitrix. Maybe a character discovers a way to unlock hidden bloodline traits within the forms available in the Omnitrix that are related to Naruto's world. This could open up new storylines about heritage and power.
In this fanfiction, Naruto might use the Omnitrix to gain various alien forms' powers. He could use those powers to fight stronger enemies in the Naruto universe, like the Akatsuki members. Maybe he would use the powers for stealth or super strength depending on the alien form.
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.
Obviously, Naruto would be one of the main characters since he has the Omnitrix. But we could also expect to see his usual friends like Sasuke and Sakura. They would be involved as Naruto uses his new powers. And perhaps some of the alien forms from the Omnitrix could be considered 'characters' in a way, as they would influence Naruto's actions and decisions.
Well, if Naruto has the Omnitrix in the fanfic, it would change the power dynamics a great deal. He could potentially access alien technology and powers that are far beyond what is normal in the Naruto world. This might lead to new alliances or enemies. Maybe the Hidden Villages would be both in awe and a bit afraid of his newfound powers, and he'd have to deal with the politics of that as well as any new threats that come his 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.