One great fanfiction in this theme could be 'Trunks' New Heart'. It beautifully depicts Future Trunks' journey of falling in love with a Saiyan. The author does an amazing job of exploring his character in the context of new emotions.
A common trope is the 'forbidden love' aspect. Since Future Trunks has a lot of responsibilities and his situation is often complex, falling in love with a Saiyan can be seen as something that goes against his duties at times. Another trope is the 'power couple' idea. As both are Saiyans or related to Saiyans, they are often depicted as being extremely powerful together, both in combat and in their relationship.
One interesting fanfiction could be about Future Trunks exploring new time - traveling adventures. Maybe he discovers a parallel universe where the Z - fighters have different powers and he has to adapt quickly to survive.
Gohan would be a great character to pair with Future Trunks. They are both strong and have a deep connection to protecting the future. Their combined power and intelligence could make for some really exciting storylines.
Well, there's a fanfic called 'Trunks' Time - Travel Tales' that's really good. It plays around with the concept of Trunks' time - traveling in a very creative way. Then there's 'Future Trunks' Love Story' which, as the name suggests, focuses on his romantic relationships. Also, 'The Legend of Future Trunks' is a must - read as it expands on his character and his place in the Dragon Ball universe.
The 'Super Saiyan in Tuffle Saiyan War Fanfic' could be really interesting. The Super Saiyan form is often associated with great power, speed, and energy in the Dragon Ball universe. In the context of this fanfic's war, it could mean that the Saiyans with this form are the key to victory. They might be able to break through Tuffle defenses, or their presence on the battlefield could demoralize the Tuffle forces. Also, the journey of a Saiyan achieving the Super Saiyan form during the war could be a central part of the story, like how they overcome their own limits to reach this powerful state and save their race from the Tuffle threat.
A possible storyline could involve Naruto discovering a new form of power that combines his chakra with Saiyan energy, leading to his Super Saiyan - like transformation. He might then face a new and extremely powerful enemy that only his new form can defeat. Along the way, his friends would be both amazed and a little worried about this new side of Naruto.