Gohan may become more confident in relationships. In a harem situation, he has to deal with multiple people interested in him, which could boost his self - assurance.
In a Broly x Gohan fanfiction, Gohan could develop a new understanding of power. Instead of just relying on his academic knowledge and some of his traditional training, he could learn from Broly that power can also be about pure instinct. Meanwhile, Broly could develop his mental faculties. Gohan might introduce Broly to things like meditation or mental focus exercises. As a result, Broly becomes less of a mindless brute when it comes to fighting and more of a thinking fighter, which would be a significant character development for him.
Gohan's character often develops by learning to control his Super Saiyan 3 power better. He might start out as a bit reckless with it and then grow more disciplined. For example, he could initially use it to show off but later realize the responsibility that comes with such great power.
In this fanfiction, Gohan might learn valuable life lessons from Grandpa Gohan. Maybe Grandpa Gohan would teach Gohan some old - fashioned martial arts techniques that have been forgotten over time.
In such a fanfiction, perhaps future Gohan could warn present - day Gohan about upcoming threats that he has faced in his own timeline. He might share his experiences and knowledge, which could make present Gohan a stronger fighter and a wiser person.
It could be that a new threat emerges. Maybe another android, stronger than Cell, was observing the fight and decides to take advantage of the chaos after Gohan's death. This new android could become the main antagonist as it poses a greater danger to the remaining fighters.
Well, it could be a powerful gamer who has a grudge against Gohan. Maybe this gamer has lost to Gohan in some important in - game tournaments and now wants revenge. So he devises all kinds of devious plans to undermine Gohan's progress in the game.
A possible plot twist could be that future Gohan is actually an impostor sent by an enemy to manipulate the real Gohan. Another twist might be that when they meet, their powers combine in an unexpected way that causes some sort of time rift or a change in the timeline.
Gohan's relationships would develop differently. Let's say he goes back to when he was a kid and meets his father, Goku, at a younger age. He'd have a different kind of bond with him. He could teach Goku things he learned in the future, and this would change how they interact. Also, his relationship with Piccolo would be altered. He might be able to train with Piccolo in a more advanced way earlier, leading to a stronger bond based on mutual growth and respect. Overall, Gohan would become more of a proactive and influential character in the past.