Well, in some Naruto fanfictions, Bardock might be sealed by powerful jutsu. Maybe a dark ninja uses a forbidden sealing technique to lock him away, preventing him from interfering with their evil plans.
The balance of power in the Naruto universe of the fanfiction could be disrupted. If Bardock was a powerful force against some impending evil, his sealing could allow that evil to thrive. For example, if there was a powerful enemy that Bardock was meant to fight, with him sealed, the enemy could start to conquer and cause chaos more easily. Also, his friends or allies might start a quest to unseal him, which could lead to many adventures and encounters with other characters, both good and bad.
In many such fanfictions, it could be a variety of deities. It might be an ancient and powerful god from Naruto's world's mythology that the story's author has chosen to insert. For example, it could be a god of elements like a super - powerful fire god, which could give Naruto even more control over his existing fire - based jutsu and new, more extreme abilities related to fire.
In some fanfictions, Kushina was sealed into Naruto through a complex jutsu. It might be a modified version of the sealing jutsu used to seal the Nine - Tails. The process could involve special incantations and chakra manipulations.
In such a fanfiction fusion, Naruto might gain some of Bardock's battle instincts. Bardock was a fierce Saiyan warrior, so Naruto could potentially have an even greater edge in combat. He might also inherit some of Bardock's Saiyan traits, like enhanced strength and speed at a more fundamental level. This could make him even more formidable against powerful foes in the Naruto universe.
Obviously Naruto is one of the main characters. Since it's about him being the son of Bardock, Bardock is also an important character even if he might be more of a backstory presence. And characters like Sasuke and Sakura would still likely be involved as they are Naruto's friends in the original Naruto story.
One interesting Naruto Bardock fanfiction could be about Bardock surviving and coming to the Naruto world. He might use his Saiyan strength and battle experience to help Naruto in his fight against powerful foes. Maybe he'd train Naruto in a different way, drawing on Saiyan training methods.
In the 'naruto is bardock fanfiction', a key aspect could be the cultural clash and fusion. Naruto comes from a world of ninjas with its own set of rules, ethics, and traditions. Bardock, on the other hand, is from the Saiyan race. So, seeing how Naruto adapts to the Saiyan culture or brings his ninja culture to the Saiyan context would be quite engaging. For instance, how would Naruto's concept of teamwork in the ninja world translate to the more individualistic Saiyan society? And how would the Saiyan's battle - hungry nature affect Naruto's more pacifist tendencies at times?
Maybe Bardock's past and his own struggles in the Dragon Ball universe could parallel Naruto's journey in some way. For example, both are from warrior - like races (Saiyans and the Uzumaki clan which has a reputation for being strong). Their fates could be intertwined as they face challenges together. Bardock could teach Naruto some of his Saiyan fighting techniques, which Naruto could then adapt to his own ninja style.
In this fanfiction, Naruto's character could be reimagined in multiple ways. Firstly, his power source might change. Instead of relying solely on chakra, he could have some Saiyan - like energy. His backstory could also be altered to incorporate Bardock's influence. For example, he might have a newfound sense of purpose related to the Saiyan race. His relationships might shift too. He could be more of a loner like Bardock was at times, or he might form new alliances with characters who are also connected to the Saiyan lore. This reimagining would create a whole new dynamic for Naruto's character development throughout the story.