Another plotline could be that there is a mad scientist in the Naruto world who is trying to create a zombie - like plague similar to what happened in Z Nation. Addy, being familiar with such a situation, teams up with Naruto and his friends to stop the scientist. Along the way, they face many challenges, like dealing with the different cultures and powers of the two worlds. Addy might also have to overcome the mistrust of some Naruto characters who are not used to outsiders, especially ones from such a strange world as Z Nation.
One possible plotline could be that Addy somehow gets transported to the Naruto world. Maybe she has to learn about chakra and ninjutsu while also using her skills from Z Nation to survive in this new and strange place.
I'm not sure specifically which 'Naruto x Z Nation Naruto x Addy' fanfictions are the best. You could try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide variety of fan - created stories, and you can use the search function to look for ones related to this specific crossover.
One possible plotline is that Naruto uses his telepathy to communicate with the spirits of the past Hokages. He could gain wisdom and knowledge from them that would help him in his battles and in leading the village. Another plotline could be that he uses it to understand the motives of the Akatsuki members better and tries to convert some of them to the side of the Leaf Village.
One possible plotline could be that fem Naruto has to overcome her blindness to prove herself as a ninja. She might develop unique fighting styles or sensory abilities that compensate for her lack of sight.
In some fanfictions, there could be a situation where Naruto is affected by a powerful genjutsu that no one else can break. Konan, with her unique skills and perhaps some knowledge about the caster of the genjutsu, manages to save Naruto. It could be that she has to go through a series of trials or battles to get to the source of the genjutsu and free Naruto. This could also lead to a deeper connection between Naruto and Konan as they work together to find out who is behind the genjutsu and prevent further attacks.
A possible plotline could be a training arc. Tsunade could be training both Naruto and Sakura in a new and advanced form of combat or medical ninjutsu. This would involve a lot of character development as they struggle to master the new skills. For example, Naruto might have trouble with the precision required in a medical - related technique while Sakura helps him out, and Tsunade observes and gives tough love guidance.
Another plotline could be a more psychological exploration. Orochimaru has always been a bit of an enigma, and his love for Naruto could be a way to explore his own humanity. Maybe he has a change of heart because of Naruto and starts to question his past actions. This could lead to a journey of self - discovery for Orochimaru, while Naruto is left to figure out how to deal with this new side of his old enemy.
One possible plotline could be that Kale somehow ends up in the Naruto world and Naruto has to help her adapt. They could then form a bond and fight together against common enemies.
One possible plotline could be Fem Indra being a time - traveler and changing the course of Naruto's story. For example, she could prevent some of the major tragedies that occurred in the original Naruto storyline.
One possible plotline could be that Naruto, being neglected by the village, finds solace in Kuroshitsuchi. They start to form a friendship that gradually turns into something more. Another could be that Kuroshitsuchi discovers Naruto's situation and decides to help him, which then leads to a deep connection between them.
One plotline could be that Naruto's long hair is a sign of a connection to an ancient power. He has to learn to control this power which is linked to his long hair. Along the way, he meets other characters who have knowledge about this power and his long hair becomes a central part of his journey to master this new ability.