They might have an epic battle to test Luffy's growth. Shanks could see how much stronger Luffy has become and be proud. Maybe Luffy will show off his new Haki abilities.
They could start with a big hug. Then Shanks might tease Luffy about his still - crazy appetite. Luffy, in turn, could show off his new crew members to Shanks.
Luffy might be more confident and less like a little kid around Shanks. He has grown a lot, and Shanks would notice this. Their relationship could become more of an equal partnership in terms of respect.
In this fanfiction, perhaps Luffy has become much stronger. He might show Shanks his new skills and powers. They could also talk about their adventures since they last met, like Luffy sharing his experiences on different islands.
When Luffy meets Shanks again in the fanfiction, it might change the story in several ways. For one, Luffy could get new directions or insights from Shanks. This could lead the Straw Hat crew to a new island or a new adventure. Also, Luffy's crew might gain new allies through Shanks' connections. And Luffy's resolve to become the Pirate King could be strengthened even more, which would drive the story forward with more determination.
In the fanfiction, Luffy might show Shanks how much he has grown. He could display his new Haki abilities and his stronger crew. Shanks would be proud of Luffy's progress.
In fanfiction, when Sabo and Luffy meet again, they might have an emotional reunion. They could share stories of their adventures since they last saw each other. Sabo might show off his new skills or powers, and Luffy would be excited to see his brother again. They could also plan new adventures together, vowing to face any challenges as a team.
Shanks influences baby Luffy by being a role model. He shows Luffy the exciting life of a pirate. For example, his tales of adventure on the high seas make Luffy long for the same. Also, Shanks' courage, like when he faces danger without hesitation, makes Luffy admire him and want to be like him.
One interesting luffy and shanks fanfiction could be about Luffy finally reaching the level where he can have an epic battle with Shanks to prove his worth. In this story, Luffy might show off all the new skills he has learned during his adventures. Another could be a story where Shanks reveals a big secret to Luffy about his family that changes Luffy's perspective. There are also fanfictions where they team up against a common enemy much stronger than any they've faced before.