It's really hard to say. Goku has his Super Saiyan forms which give him incredible power boosts. But Superman has super strength, heat vision, and is nearly invulnerable. In a short fight, Superman might have the edge due to his instant powers like flight and super strength without having to power up. But if Goku manages to reach his higher Super Saiyan forms and uses techniques like the Spirit Bomb, he could potentially defeat Superman.
Maybe a story where the Dragon Balls are accidentally sent to the DC universe. This would attract the attention of characters like Batman who would be intrigued by their power. Then, characters from Dragon Ball would have to travel there to retrieve them, leading to all sorts of encounters and battles.
The Dragon Ball system in the DC world novel would likely bring a whole new level of power dynamics. The Dragon Balls' ability to grant wishes could disrupt the existing power balance in the DC universe. For example, villains could use the Dragon Balls to gain ultimate power or immortality, which would pose a huge threat to superheroes like Superman or Batman. However, heroes might also use the Dragon Balls for good, such as wishing for the restoration of a destroyed city or bringing back fallen comrades.
Dragon Ball Super vs GT in fanfiction can lead to some really interesting character developments. The different timelines and power systems in both series offer a lot of room for creativity. In some fanfictions, the younger characters from Super might meet their older counterparts from GT. This can create a contrast in personalities and fighting styles. For example, Trunks in Super is more used to the modern power-ups and technology, while Trunks in GT has a more 'old - school' approach. Fanfic authors often use these differences to create engaging stories that explore not only the battles between the two series but also the underlying themes and character growth.
One idea could be a battle between Goku and Superman. They could start off as rivals, each thinking their own planet needs more protection. As they fight, they gradually realize they have more in common than they thought, like their strong sense of justice. Then they team up to face a common enemy, like Darkseid and Frieza working together.
Some characters might be tempted by the power of the Dragon Balls. Lex Luthor, for instance, would likely see them as a means to finally defeat Superman. He could wish for kryptonite to be omnipresent or for Superman to lose his powers permanently. On the other hand, characters like Wonder Woman might have moral dilemmas about using the Dragon Balls, as their power could be seen as a shortcut rather than relying on one's own strength and virtue.
Goku would be really excited to meet all the different heroes in the DC universe. He'd probably want to spar with everyone right away. Flash would be intrigued by Goku's ability to move at high speeds using his Ki. They could have a friendly race or competition to see who's faster in different situations. At the same time, Piccolo could team up with Martian Manhunter. They both have the ability to sense things from a distance and could use their skills to detect threats to both universes.
In some fanfictions, Vegeta might team up with Batman. Vegeta's combat skills and Batman's strategic mind would make for a great combination. They could work together to take on a powerful villain that threatens both the Dragon Ball Z and DC Universe. For example, a villain who has the ability to steal energy like Cell and the mind - controlling powers of Brainiac.
It's hard to say. Goku in Dragon Ball Super has Ultra Instinct which gives him incredible speed and reflexes. But in GT, his Super Saiyan 4 form is also extremely powerful. However, if we consider the fact that Ultra Instinct seems to be a more refined and spiritual form of power, it might give Goku in Super an edge. But then again, the Super Saiyan 4 form has its own advantages like the combination of Saiyan and Great Ape power.
Another possible ending is that Gohan sacrifices himself to defeat Cell. He could use a self - destructive move that not only takes out Cell but also costs Gohan his life. This would be a very dramatic and tragic ending, but it would also show Gohan's selfless heroism.