Another plot could be that Temari travels to the future by accident. In this new future, the Hidden Sand Village has been completely transformed. She has to figure out what happened and find a way to get back to her own time, while also learning new jutsu and techniques from this advanced future version of the village.
One idea could be that Temari travels back in time to the founding of the Hidden Sand Village. She could use her knowledge of modern jutsu and combat strategies to help her ancestors better defend the village against early threats.
Maybe they travel back to a crucial moment in the Fourth Great Ninja War. With their future knowledge, they are able to prevent certain tragedies from occurring. Naruto could change the course of a battle by warning the Allied Shinobi Forces about an ambush, and Temari could use her strategic mind to better organize the troops.
One idea could be that Shikamaru and Temari have to go on a joint mission in a foreign land. They face various challenges together which make them rely on each other's skills. Shikamaru uses his intelligence to outwit the enemies while Temari uses her wind jutsu. This mission brings them closer and they start to develop deeper feelings for each other.
One interesting plot idea could be a mission where Naruto and Temari are paired together. They start off bickering as they have different ways of approaching things, Naruto being more impulsive and Temari more calculating. But as the mission progresses, they learn to understand and complement each other's skills. For example, Naruto's ability to quickly adapt in battle combined with Temari's strategic thinking could lead them to defeat a powerful enemy. Another idea is a story set in a time where the ninja villages are having a cultural exchange. Naruto and Temari get to know each other's cultures better, which deepens their bond. It could also involve some friendly competitions between them related to their respective village's specialties.
One idea could be a mission where Naruto, Temari and Tenten are teamed up. They have to retrieve a powerful and ancient scroll from a hidden temple. Along the way, Naruto's determination and positive attitude inspire Temari and Tenten. Tenten shows off her weapon skills, and Temari uses her wind jutsu to clear obstacles. They face various traps and enemies, and in the end, they bond over their shared success and newfound respect for each other.
In some 'naruto and temari time travel fanfiction', a great plotline could be that Naruto and Temari are sent back to a time when the jinchuriki were first created. They might try to find a way to end the cycle of pain that the jinchuriki have to endure. This could involve them having to face powerful ancient shinobi who first came up with the idea of sealing tailed beasts into humans. Also, they could travel to a time when a certain powerful jutsu was first discovered, like the Rasengan or the Wind Scythe. They could either learn the original version of these jutsu or prevent them from being misused in the future.
One plot idea could be that Temari is arranged to marry someone from a minor clan in Konoha. This causes a stir as she is from Suna and has a high status. She initially struggles with the idea of being married into a less - prominent family, but then discovers that the family has some unique and secret techniques that could benefit Suna. Another idea is that the arranged marriage is part of a prophecy. Temari and her future partner must work together to fulfill the prophecy, which involves saving both Konoha and Suna from a great danger.
Perhaps Naruto, in his banished state, has some new and unique abilities that Temari is intrigued by. She decides to help him master these powers in secret. As they train together, feelings start to develop. Their relationship could then be a source of conflict between Konoha and Suna as the two villages have different views on Naruto's banishment and his newfound connection with Temari.
A really interesting plot could be a time - travel fanfiction. Naruto and Temari are sent back in time to a crucial moment in the history of their villages. They have to work together to make sure the events unfold in a way that doesn't change the future too drastically, but also helps to prevent some of the darker events that occurred in their past.
One idea could be that Naruto and Temari team up for a special mission after they've retired from being ninjas. They have to face an old enemy who has new powers. Another could be that they start a ninja school together in a different village, teaching new generations their skills.
One idea could be Yoda traveling back in time to train Anakin Skywalker differently, thus preventing his fall to the dark side. Maybe he goes back to the very beginning of the Jedi Order to gain more knowledge about the Force and bring it back to his own time.