One idea could be a crossover with the Dragon Ball Super universe and the DC Comics universe. Zamasu could team up with Darkseid, believing they share a similar view of bringing 'order' to their respective realms. Another idea is a crossover with the Naruto universe, where Zamasu tries to impose his will on the ninja world, facing off against powerful shinobi like Naruto and Sasuke. Or perhaps a crossover with the Star Wars universe, with Zamasu as a Sith - like figure, trying to gain control over the Force.
One interesting Zamasu fanfic could be about his origin story in more detail. It might explore his early days in the Kaioshin realm, his training, and how his ideology started to form.
Zamasu meets his end in the manga because he underestimates the strength and strategy of Goku and Vegeta. They exploit his weaknesses and deliver the final blow that finishes him off.
The Roaring Dragon is a work by Wu Luxiang. It was published on November 1, 2015 by Xinhua Press. The book was based on the difficult journey of the Chinese Party members represented by Mao Ze Dong from October 1934 to October 1935 when they evacuated Ruijin, Jiangxi Province, and arrived at Wuqi Town, Northern Shaanxi Province after the Long March. It truly reproduced the difficult choices and heavy prices faced by the Red Army during the Long March. The author borrowed a few poems from Mao Ze-dong's poem "Seven Laws·Long March" as the sub-titles of the four major parts of the book, presenting a panoramic view of the Red Army's journey of crossing the Jinsha River, crossing the Dadu River, climbing snow mountains and grasslands, and arriving at Wuqi Town. Through describing the suffering of the Red Army and Mao's firm belief, the book showed the perseverance and power of belief of the Chinese Communists.
The idea of an alternate universe is also very common. Since Zamasu is from a different franchise, fanfictions like to create a new world where both Naruto and Zamasu co - exist. This allows for new character relationships to be formed, new storylines to be developed, and for the writers to be really creative with the setting and the overall plot.
One common theme is the clash of ideologies. Naruto has his values of friendship and protecting the village, while Zamasu has his own extreme views. So, this often leads to interesting conflicts in the fanfics.
Redemption could also be a theme. Although Zamasu in the original was quite villainous, a female Zamasu in fanfic might be on a journey of self - discovery and redemption. She could start as a bad character but gradually change due to certain events or interactions in the story.
She might be depicted as having a complex personality. On one hand, she could have a cold and calculating side due to her divine or self - proclaimed superior nature. On the other hand, there could be a hidden vulnerability that only the male reader gets to discover. This duality can make for an interesting exploration in the fanfic.