Another plot could be centered around a prophecy that involves both Tsunade and Naruto. They have to figure out the meaning of the prophecy and how to fulfill it. Along the way, they develop a deeper understanding of each other and their respective roles in the ninja world. This could also involve some self - discovery for both characters as they grow and change in the face of the prophecy.
Perhaps a story where Tsunade and Naruto are on a mission together in a foreign land. They encounter various challenges and have to rely on each other's strengths. Tsunade's wisdom and experience combined with Naruto's determination and newfound powers could make for an exciting adventure as they face powerful enemies and try to protect the local people.
One interesting plot could be that in this fanfiction, Futa Kushina has some special abilities that she passes on to Naruto in a unique way. For example, it could be a power that allows Naruto to communicate with spirits more effectively, which then helps him in his battles and in understanding the history of the ninja world better. Another plot might involve Futa Kushina coming back to life briefly and training Naruto in a forgotten ninja art that gives him an edge over his enemies. Maybe this art has something to do with space - time manipulation on a smaller scale, like being able to quickly move between short distances without being detected.
In some 'naruto x tsunade time travel fanfiction', an interesting plot could be that Naruto and Tsunade travel back to a time when the Hidden Leaf Village was just being founded. They have to deal with the primitive and often dangerous situations of that era. Naruto might introduce some future - like ideas to help build the village, while Tsunade uses her medical skills and leadership to gain the trust of the early villagers. It's also possible that they face challenges from other ninja clans who are not so welcoming of their new - fangled ways.
Another plot could be that Tsunade uses her medical knowledge along with Naruto's power to go back in time and heal some of the major wounds the ninja world has suffered. They could go back to the time of the First Hokage and help him build a more peaceful and prosperous ninja world from the start. In this way, they might avoid all the wars and conflicts that followed.
One popular story might be 'Naruto and Futa Tsunade's Unusual Bond'. It could explore how their unique relationship develops in a world filled with ninja challenges. Another could be 'The Adventure of Naruto and Futa Tsunade' which might involve them going on a quest together and facing various enemies.
A possible plot is that the female Kyuubi, in her own form, starts to influence Futa Naruto's decisions in battles. This causes some chaos initially as Naruto's friends are not used to this new influence. But over time, they come to realize that it might be a new strength. For example, the female Kyuubi might have different battle tactics that Naruto starts to incorporate, making him a more unpredictable opponent.
One possible interesting plot could be Tsunade using her strength and wisdom to help Naruto in a difficult mission in a way that no one else could. For example, she might use her giantess form to intimidate enemies or reach places that are otherwise inaccessible.
One interesting plot could be Naruto using his unique ninja skills to accidentally hypnotize Tsunade into believing she's a young kunoichi again. This would lead to her acting more impulsively and getting into all sorts of comical and adventurous situations in the village.
One possible plot could be Naruto accidentally discovers a hidden side of Tsunade related to ABDL. This leads to a series of comical yet heartwarming moments as Tsunade tries to keep it a secret while Naruto is just innocently curious. For example, Naruto might find some ABDL - related items in Tsunade's office and misunderstand their purpose at first.
Perhaps in the fanfiction, Naruto's godlike powers are a result of some ancient prophecy. Tsunade, being the experienced Hokage, guides him on how to control these powers. They might go on a journey to discover the origin of these powers and along the way, face many challenges together. For example, they could encounter other villages that are either jealous or afraid of Naruto's powers and try to stop them.
One common plot is a training arc where Tsunade trains Sakura further in medical ninjutsu and combat skills, with Naruto sometimes getting involved as a sparring partner or for moral support.