In this fanfiction, Goku vs Jiren is likely to be an epic battle. Goku's power with the Universe's Watch might bring new and unexpected abilities. Jiren, on the other hand, is an extremely powerful opponent. The fight could involve intense energy blasts, high - speed combat, and strategic maneuvers. It might also explore the growth of Goku's character and his newfound power in relation to Jiren's unwavering strength.
One interesting plot idea could be that Frieza somehow manages to gain new powers on a distant planet and returns to challenge Goku again. But this time, instead of just brute strength, he uses cunning strategies. Another could be a scenario where Goku and Frieza are forced to team up against an even greater threat from another universe. This would be a great chance to explore their complex relationship.
Vegeta would probably be both jealous and intrigued. Jealous because Goku has achieved a new level of power through this fusion, and intrigued because he wants to see how this new being fares against enemies. He might also be secretly glad that Frieza, his long - time enemy, is now in a form that he can tolerate (barely).
Vegeta would be a great addition. His long - standing rivalry with both Goku and Frieza adds a lot of drama. Also, Beerus, the God of Destruction. His power level and unpredictable nature would shake things up in a story with Goku and Frieza. And Bulma could be included for her technological expertise, which could be useful in creating devices to counter Frieza's advanced technology.
One great 'Dragon Ball Frieza Fanfiction' is 'Frieza's Redemption'. It explores a different side of Frieza where he tries to atone for his past sins. It's interesting to see how the author develops his character in a new way, away from his typical villainous role.
Jiren's back story is that he comes from a race that was nearly wiped out. He was left as one of the few survivors. His experiences made him extremely strong and he dedicated himself to training hard to become the mightiest warrior, believing that only strength can protect and bring justice.
In the fanfiction, the plot could develop such that the power of the universe's watch attracts other villains or powerful beings. They might try to steal the watch from Goku during his battle with Jiren. This would add a new layer of complexity as Goku has to fend off these new threats while still trying to defeat Jiren.
The allure lies in the fact that we can see these two powerful villains in new situations. In fanfiction, they might interact with characters from other universes, which is really cool. It expands the Dragon Ball Z universe in ways the original didn't.
A possible fanfiction could focus on a group of Saiyans who are trapped in a dimension where they can only watch the Goku vs Frieza fight on repeat. They start to notice small details in the fight that they hadn't before, like the exact moment Goku's power level spikes or how Frieza is trying to adapt his strategy. This newfound knowledge could then be used by them in some way when they eventually break free from that dimension.