A crossover with the One Piece world would also be cool. GT Goku lands on the Grand Line. He meets Luffy and the Straw Hat crew. Goku would be intrigued by the Devil Fruits and the different abilities of the crew members. They could go on an adventure together to find a powerful treasure that is said to grant unlimited power. Along the way, they face various pirates and marines, with Goku's strength and the crew's teamwork making them an unbeatable force.
Another option is a crossover with a different anime world, like Naruto. GT Goku could end up in the Hidden Leaf Village. The shinobi would be amazed by his power. Goku, being Goku, would be interested in learning their ninja techniques. They could team up against a common enemy that somehow has the ability to use both chakra and ki, creating a unique and exciting battle scenario.
Don't forget about the power levels. In a crossover fanfiction, it's important to balance the powers. If Goku is in a world with less powerful characters, don't make him overpowered to the point where there's no challenge. Instead, find ways for him to be restricted, like maybe the new world has a different type of energy that he has to learn to control before using his full power. This way, the story remains interesting and the other characters can still play important roles.
Baby Goku in GT fanfiction is significant because he allows writers to explore uncharted territories of the GT universe. His character can be used to create new plot twists and turns.
Baby Goku in GT fanfiction can be a really interesting concept. A lot of times, authors will play with his Saiyan nature more. They might show him struggling with the dark side of his Saiyan instincts, which was somewhat present in the GT series but can be expanded upon in fanfiction. This could lead to some really cool character development and new story directions.
One idea could be to focus on the characters' different abilities. Blade's vampire - hunting skills and the unique powers of the Underworld vampires could create some intense fight scenes. For example, Blade could team up with Selene from Underworld to take on a new, more powerful vampire threat that combines the worst aspects of both their worlds.
A more complex scenario could involve a group of witches who are at war in their own realm. They decide to bring some of the powerful Naruto characters into their world to fight on their behalf. Naruto and his friends would have to adapt to the strange magic - filled environment and the political intrigue of the witches' war.
One idea could be a crossover with the 'Lord of the Rings' universe. The Soul of Cinder could be a powerful entity that somehow ends up in Middle - earth. Maybe it's mistaken for a dark lord by some and has to prove its true nature. Another option is a crossover with 'Final Fantasy'. The Soul of Cinder's abilities could be translated into the magic and combat system of 'Final Fantasy', creating some really interesting battles.
One idea could be a crossover with the X - Men. Spider - Man could team up with Wolverine. Their different fighting styles would make for some amazing action scenes. Wolverine's brute strength and healing factor combined with Spider - Man's agility and web - slinging abilities would be a great combination.
Another way to do this crossover is to have a prophecy that links Percy and Thor. The prophecy could say that only by the combined might of the son of Poseidon and the God of Thunder can a great evil be stopped. This evil could be a new kind of monster that has the ability to absorb both Greek and Norse magic. Percy and Thor would have to overcome their differences quickly. They would travel to different realms, both Greek and Norse, to gather items or allies needed to defeat this monster. Along the way, they would face many challenges and grow to respect each other.
Another interesting crossover could be with a superhero universe, say the Marvel universe. Picture Scorpion facing off against Spider - Man. Scorpion's hellish powers and acrobatic fighting style would make for an intense battle against the web - slinger. He could be there because he's been summoned by some dark magic that is affecting both worlds.
One idea could be to have the wizards from Harry Potter visit Azeroth. They could learn about the different magic there, like shamanistic magic or the arcane magic used by mages in Warcraft. Maybe Harry could befriend a young orc shaman and together they discover new spells by combining their magical knowledge.