A plotline could start with Frieza hearing about Broly's power and being jealous. He then devises a plan to ambush Broly. But Broly, being extremely perceptive in his own way, senses Frieza's approach and is ready for the fight. As the fight progresses, Frieza realizes that Broly is much stronger than he expected and has to use all his dirty tricks to try and win. Or perhaps the plotline could involve Broly being captured by Frieza's forces, and then Broly breaks free and goes on a rampage against Frieza and his minions.
One of the main themes is the clash of generations. Goten represents the new generation of Saiyans while Frieza is from an older, more menacing era. This creates an interesting dynamic. Survival is also often a theme, as Goten has to fight to survive against Frieza's brutal attacks. Additionally, the theme of justice can be seen, where Goten is fighting for what he believes is right against Frieza's tyranny.
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.
Trunks would also be interested. He has his own experiences with fighting powerful foes and would be eager to see how Goku, a great Saiyan warrior, fares against Frieza. Also, the younger Saiyans like Goten might be interested. They've heard stories about Frieza and would be excited to see their father or other Saiyan heroes in action against such a notorious villain.
Well, 'Goten vs Frieza: The Final Confrontation' is a really interesting piece. It shows how Goten uses his unique skills and training to take on Frieza. And then there's 'A New Hope for Goten Against Frieza' where Goten has to overcome some internal doubts as well as Frieza's powerful attacks. You can usually find these by simply searching on the major fan fiction platforms.
Mewtwo is significant as it was created through genetic manipulation. It was made to be a powerful Pokémon. In the 'Mewtwo Origin Story', it discovers its origin and questions its purpose, which is a major part of its significance.
In the 'pokemon mewtwo origin story', it was a group of scientists who created Mewtwo. They were trying to make a very powerful Pokemon by cloning Mew.
In a'mewtwo meets mewtwo fanfiction', it could start with the two Mewtwos being summoned by an unknown force. At first, they are confused and defensive. As they interact, they find out that their memories of creation and the pain of being experimented on are very similar. They might then decide to search for the source of this unknown force together. Along the way, they face various challenges, like other powerful Pokémon trying to stop them or humans who fear their combined power. But through their shared experiences and newfound bond, they are able to overcome these obstacles.
Frieza might initially be shocked. He's used to being a feared and powerful being, and the idea of having a family is very foreign to him. So he could be in denial at first.