A great concept for a Super Saiyan crossover fanfiction would be to cross it with the Harry Potter world. Imagine a Super Saiyan wizard or witch. They could use magic spells while in their Super Saiyan form. Or perhaps a crossover with the God of War series, where the Super Saiyans fight alongside Kratos against the gods of that universe.
Another aspect to consider is how the Super Saiyan transformation would affect the relationships in the Naruto world. If Sasuke were to gain Super Saiyan powers, it could either drive him further away from Naruto due to the newfound power or bring them closer as they explore the new abilities together. Also, the concept of ki from Dragon Ball and chakra in Naruto could be merged, creating a whole new type of energy for the characters to utilize.
One popular example could be a crossover with Dragon Ball and Naruto. In such a fanfiction, a Super Saiyan 4 character might enter the Naruto universe and have to face off against powerful ninja. Another example could be a crossover with One Piece. The Super Saiyan 4's incredible power would be a huge contrast to the Devil Fruit users in One Piece. There are also crossovers with DC Comics, where the Super Saiyan 4 could potentially battle Superman or other powerful heroes.
One great Super Saiyan Blue Goku crossover fanfiction is 'Goku in the DC Universe'. It's really exciting to see Goku interact with Superman and other DC heroes. He has to adjust to the different power levels and rules in that universe.
Goku from Dragon Ball is a must - include. He's the iconic Super Saiyan. And then maybe Thor from the Marvel Universe. Their different powers would make for an interesting dynamic. Also, Link from The Legend of Zelda could be a great addition, as he has his own set of unique abilities.
In a Super Saiyan 4 crossover fanfiction, it often changes the original storylines by introducing new elements. For example, if it's a crossover with the Harry Potter universe, the Super Saiyan 4's presence would disrupt the magic - based power system in Hogwarts. Instead of wands and spells, there's now a being with incredible physical strength and energy attacks. It can also change the relationships between characters. The Saiyan might form an alliance with some characters, changing the course of their actions.
The fanfiction should also do a great job of blending the two universes. Let's say it's a Goku and 'One Piece' crossover. The power - scaling, the different races, and the overall aesthetics of both universes need to be combined in a seamless way so that it feels like a natural and exciting story.
Well, you could do a time - travel based crossover fanfiction. Have a legendary super saiyan like Vegeta travel back in time to a different era in the Dragon Ball Z universe. He could meet his younger self and together they could face a new threat that was previously unknown. Or, a crossover with a video game world. Picture the legendary super saiyan Trunks entering the world of Final Fantasy and having to go on a quest there.
A possible storyline could involve Naruto discovering a new form of power that combines his chakra with Saiyan energy, leading to his Super Saiyan - like transformation. He might then face a new and extremely powerful enemy that only his new form can defeat. Along the way, his friends would be both amazed and a little worried about this new side of Naruto.