Perhaps there could be a story where the German Army is in a war against an enemy with strange powers, and they call upon Naruto - style ninjas from another dimension to help them. The ninjas then have to adapt to the military structure of the German Army while also using their own unique abilities to fight the common foe.
One possible storyline could be a Naruto - style ninja being part of a special unit in the German Army during a fictional alternate history. Maybe they use their ninja skills for stealth missions. For example, sneaking into enemy camps to gather intelligence, much like how Naruto and his friends would gather information in their own world.
Well, Naruto himself would probably be really excited. He'd be running around the military base, trying to make friends with everyone. His positive attitude might initially seem out of place in the strict military environment but could also start to change the atmosphere, making it more lively.
One possible storyline could be Naruto being recruited into a special unit of the US Army. He could use his ninja skills like shadow clones for scouting or his Rasengan as a powerful weapon in combat situations against fictional threats.
One possible storyline could be how the Hidden Leaf Village copes with his death. Maybe there are power struggles as different clans vie for leadership in the absence of Naruto's unifying presence.
One possible storyline could be that Kalawarner somehow ends up in the Naruto universe. She might be confused at first but then use her own skills to help Naruto and his friends in a battle. Maybe she has some unique powers that are useful against a new enemy.
One possible storyline could be that Naruto is chosen as a temporary Kazekage due to a threat that requires his unique skills. He then has to deal with internal conflicts within the Sand village while also facing external enemies. Another could be that there is some kind of prophecy that only Naruto can fulfill as Kazekage to save both Konoha and Suna.
One possible storyline could be Naruto as an elf trying to fit into the ninja world while still having his elf heritage. He might face discrimination from some who don't understand his different nature.
In a Naruto and Derieri fanfiction, a possible storyline could be that Derieri is mistaken for an enemy in the Naruto universe. Naruto, being the one to see her potential for good, tries to convince others that she is not a threat. As they try to clear her name, they uncover a conspiracy that threatens both their worlds. This would involve a lot of mystery - solving and action as they race against time to stop the conspiracy.
He might become a hero in the eyes of some people. But he could also be feared by others who see his power as a threat.
Another idea is that Naruto, while on a mission, stumbles upon a portal that leads him to the world of the Thundercats 2011. There, he meets Cheetara and they form an alliance. They could face off against common enemies like powerful villains from both universes who are trying to take over both worlds.
One possible storyline could be that Naruto has to go on a dangerous mission that might cost him his life. Temari is in love with him but can't stop him. She's sad because she might lose him. Another could be that there are political tensions between Konoha and Suna again, and they are forced apart due to their loyalty to their respective villages. They're sad as they have to give up their relationship.