There are several interesting themes. The idea of alternate universes is quite captivating. In some fanfictions, there are entire different Dragon Ball Super universes with different rules and character developments. The theme of redemption for villains is also common and interesting. It gives a new perspective on characters like Frieza or Cell. Additionally, fanfictions that explore the origin stories of characters in more detail than the original series, such as the origin of the Saiyans, can be really engaging for fans.
One of the interesting power - ups could be his Ultra Instinct form. In fanfiction, it might be further enhanced, like having different levels that are not shown in the original. For example, he could have an Ultra Instinct - Kaioken combination which would be extremely powerful.
One popular theme is alternate timelines. Writers like to explore what would happen if certain events in GT were changed. For example, if Goku didn't turn into a child in the beginning of GT. It gives a whole new perspective to the story.
One popular theme is the exploration of Broly's character development in relation to Chirai. Maybe showing how their relationship could change Broly from his usually berserk state. Another theme could be adventure, with them teaming up to face new threats in the Dragon Ball universe.
One popular platform is FanFiction.net. It has a large collection of Dragon Ball Super fanfictions with various themes and writing styles. Another option could be Archive of Our Own (AO3). It is known for its wide range of fan-created content, including many Dragon Ball Super fanfictions. Wattpad also has some Dragon Ball Super fanfictions, though the quality can vary widely.
Goku is, without a doubt, one of the most popular. His constant pursuit of strength and his ability to overcome seemingly impossible odds make him a favorite for fanfiction writers. They can create all kinds of new adventures for him, like facing off against cosmic threats even greater than what he's encountered in the shows.
The introduction of new characters with unique abilities is a major plot twist. Characters like Jiren, who was extremely powerful and had a different fighting style compared to the usual Dragon Ball villains. His presence in the Tournament of Power made it difficult for our heroes. Also, the way the relationship between the angels and the Gods of Destruction was explored added an interesting layer to the plot.
One idea could be a story where Goku and Vegeta from Dragon Ball Super end up in the world of Dragon Ball GT by some sort of time - space rift. They then have to team up with the GT versions of themselves to fight a new, powerful enemy that is threatening both timelines.
One interesting fan theory is about the potential hidden powers of some minor characters. For example, some think that Yajirobe might have a secret super form that was never revealed in the original series. It's just a fun idea that fans like to explore in fanfiction.
In 'Dragon Ball Super Cheelai' fanfiction, a recurring theme is her journey of transformation. This includes not only physical transformation in terms of power - up but also emotional and mental growth. Another theme is her place within the complex power structure of the Dragon Ball multiverse. Since she comes from Universe 6, she has to navigate through the different power dynamics between universes. Also, the theme of friendship and alliance is quite common. She forms bonds with characters from other universes, and these relationships are often explored in great detail in fanfictions. Fanfiction writers like to delve into how these relationships affect her actions and decisions, as well as how she influences the other characters in return.
One interesting story could be about a new Saiyan character introduced in the fanfiction. This Saiyan might have a unique power that even Goku and Vegeta are intrigued by. Maybe they train together to unlock new levels of Super Saiyan forms.