He could also interact with the new generation of ninjas in his own village who might see him as a relic of the past at first. But as they get to know him, they learn valuable lessons from his experiences. He could train them in unique ways that combine his old - school ninja techniques with the new knowledge and abilities that the new generation has developed.
One possible plot could be Naruto, as an old man, crossing over into a different ninja village's future. He could use his vast experience to help them solve a long - standing mystery or conflict. For example, he might discover that an old enemy has left a hidden threat that is now emerging in this new village. His wisdom and still - potent ninja skills would be crucial in dealing with it.
One common theme is the passing on of knowledge. Since Naruto is old, he has a wealth of experience to share with the characters from the other crossovers. Another theme is the idea of facing new challenges in old age. Naruto may be past his prime physically, but his wisdom and spirit are still strong.
Yes, there might be such fanfictions. Many fanfic writers like to explore different timelines and scenarios for their favorite characters. In a 'naruto is an old man' fanfic, Naruto could be having adventures that are different from his youth, perhaps mentoring the new generation with his years of wisdom.
Common themes include identity. In crossovers, Naruto may question his identity as a ninja when he's in a world like Middle - earth (from Lord of the Rings crossover). He has to figure out how he fits in. Another theme is the search for purpose. If he's in a Ghost in the Shell - type world, he might be searching for what his role is in that high - tech, complex world. And unity is also a theme. When he teams up with characters from a different universe, like in a crossover with the Avengers, they have to learn to work together as a united front against common enemies.
A really interesting 'old man logan crossover fanfiction' involves his crossover with the Deadpool universe. In this story, Deadpool's zany antics contrast well with Logan's more serious and world - weary demeanor. They team up to take on a group of mercenaries who are after a powerful mutant artifact. The banter between them is hilarious and makes the story very engaging.
To write a good 'old man logan crossover fanfiction', focus on the plot. Have a clear beginning, middle, and end. Maybe start with Logan being thrust into the new universe by some mysterious force. Then, as he explores this new world, he meets the characters from that universe and they either clash or team up depending on the situation. Build up the tension towards a final showdown or resolution. Also, don't forget to add some emotional depth. Logan has a lot of emotional baggage, and this can be used to create some really poignant moments in the story, especially when interacting with new characters who might trigger his memories or change his perspective.
A really cool 'old man Naruto crossover fanfic' is 'Naruto: Old Sage's Crossing'. It's set in a world where an aged Naruto crosses over to a parallel ninja world. Here, he has to use his old - school ninja skills and his matured understanding of chakra to deal with new challenges. The story is filled with action - packed scenes and also some heart - warming moments where Naruto reflects on his long life as a ninja.
Another idea is that Naruto, curious about other powerful beings, uses a jutsu to travel to the One Punch Man universe. There, he would be amazed by Saitama's strength. Naruto could try to learn from Saitama how to be so effortlessly strong, but Saitama would probably just shrug it off and say there's no special trick. They could team up to fight some of the monsters in Saitama's world, with Naruto using his ninjutsu and Saitama just punching things away.