In a 'naruto is logan's grandson fanfiction', a possible plotline could be that Naruto is initially unaware of his relation to Logan. As he grows and faces challenges, he starts to show signs of mutant abilities. This leads to a search for his true identity. Along the way, he could encounter other mutants or ninja who either help or hinder his journey. Another aspect could be that his unique powers attract the attention of powerful enemies from both universes, forcing him to team up with unlikely allies to defend himself and those he cares about.
One possible plotline could be that Madara's great - grandson discovers a hidden power within himself. Maybe he finds an ancient scroll left by Madara that contains a unique jutsu. He then has to train hard to master this jutsu while also facing off against new enemies who want the power for themselves.
One possible plotline could be Naruto growing up with a different set of skills influenced by Tsunade. Since Tsunade is known for her medical ninjutsu and super strength, Naruto might have an earlier inclination towards medical skills. He could be trained in a more balanced way between combat and healing. For example, in battles, he not only uses his regular jutsu but also heals his comrades instantly on the spot. Another aspect could be the political influence. Tsunade being an important figure in the village, Naruto might have a different standing in the village hierarchy from the start and face different kinds of challenges related to leadership and decision - making.
One possible plotline could be that Naruto discovers his connection to the Sannin later in his life. This new knowledge gives him access to hidden jutsu or knowledge that the Sannin had. For example, he might learn some unique medical ninjutsu from Tsunade. Another plot could involve Naruto facing enemies who are after the secrets that the Sannin might have passed down to him.
One plotline could be Harry's discovery of his relation to Grindelwald. Maybe he finds an old family heirloom or a hidden letter that reveals the truth. Another could be how the wizarding community reacts to this news. Some might fear Harry, thinking he has inherited Grindelwald's dark tendencies.
One possible plotline could be Harry trying to gain Tywin's approval while also holding onto his own values. Another could be Harry using his unique skills to help Tywin in his political maneuvers.
Perhaps there is an external threat to their mateship. A powerful villain could be trying to break them apart for some reason, like using magic or blackmail. So, they have to fight against this threat to stay together.
One plotline could be Naruto having to deal with the expectations and legacy of Tobirama. Since Tobirama was a great shinobi and one of the founders, Naruto might feel pressured to live up to that. Another could be the discovery of this lineage leading to new enemies targeting him.
A possible plotline could be a love triangle situation. Rocky has feelings for Logan, but there's another character interested in her too. In the end, after some drama, Rocky and Logan share a kiss, resolving their feelings.
One possible plotline could be that Emma and Logan are lovers, but Logan is a werewolf and Emma is human. They struggle to keep their relationship alive while hiding Logan's true nature from the world.
Yes, there might be such fanfiction out there. Fanfiction writers often come up with really creative and out - of - the - box ideas like this. However, I haven't read this particular one myself, so I can't give you specific details about it. You could try searching for it on fanfiction websites like Archive of Our Own or FanFiction.net.