One idea could be to explore how Tatsumi and Mine handle the news of her pregnancy during the chaos of their fight against the corrupt empire. Maybe they initially worry about how their child will grow up in such a dangerous world, but then find hope in the idea of creating a better future for their family.
One way their worlds could collide is through a crossover event. Maybe a powerful villain uses some sort of dark magic or technology to bring characters from both Naruto and Akame ga Kill together. For example, they could be forced to fight in a gladiator - like arena where the only way to survive is to team up with unlikely allies. Naruto's skills in ninjutsu and his strong will would be an interesting contrast to Mine's use of her Teigu and her sharpshooting abilities.
In some fanfictions, a crossover might involve the Akame ga Kill characters joining Naruto in his fight against the Akatsuki. Akame's Murasame could be a formidable weapon against the likes of Sasori or Hidan. And imagine Tatsumi learning chakra control from Naruto. It would be a cool way to blend the two universes. Also, the different power systems interacting, like the Teigu in Akame ga Kill and the kekkei genkai in Naruto, could lead to some really creative plotlines.
Growth and redemption are also themes. Tatsumi and Mine have both done things they might regret, and fanfictions can show them growing as characters and finding redemption. For example, they might try to make up for past mistakes by helping those in need. Additionally, friendship is a theme, as their relationship is also based on a strong friendship that has developed over time.
Mine, on the other hand, would probably become more reliant on Tatsumi. With the physical and emotional changes of pregnancy, she would need his support more than ever. This could deepen their emotional bond as they navigate through this new chapter of their lives together.
One idea could be a crossover where Naruto and Sasuke are somehow transported to the world of Akame ga Kill. They could team up with Akame and the Night Raid members to fight against the corrupt empire in that world. Maybe Naruto uses his shadow clones to gather intelligence, while Sasuke's sharingan helps in combat against the powerful foes.
One possible plot could be Tatsumi and Mine going on a secret mission together. They might face a powerful and unexpected enemy, and during the battle, they discover new abilities within themselves and grow closer as a result. Another plot could be a story set in a peaceful time after the main events of Akame ga Kill. Tatsumi and Mine are trying to build a new life, but they still have to deal with the traumas of their past.
Regarding the 'choes and dealth' in Akame ga Kill Naruto fanfic, it could be that the 'choes' are the remnants of the different values and powers from both universes. These could be in conflict and result in death. The Naruto characters' belief in friendship and perseverance might clash with the cut - throat nature of Akame ga Kill. This conflict could cause a lot of death and destruction. It could also be a way to explore how different cultures and power systems interact when merged in a fanfic.
One interesting Naruto and Akame ga Kill harem fanfiction is 'Naruto in the World of Akame ga Kill'. In this story, Naruto's skills and personality are blended into the Akame ga Kill universe, leading to some unique interactions with the female characters from both series. It has an engaging plot that keeps you reading as he tries to navigate this new and dangerous world while also dealing with the growing harem around him.