Well, one possible plot could be that Luffy, while on one of his adventures, accidentally stumbles upon Dragon in a secret island. They initially don't recognize each other, but then some events unfold that make them realize their connection. Maybe they end up having to team up to fight against a common enemy that is threatening the freedom of the island's inhabitants.
A powerful and corrupt World Noble could be the main antagonist. They might be trying to stop both Luffy and Dragon's efforts for freedom. The World Noble could have a large military force under their control and be causing chaos and oppression in various parts of the world. This would force Luffy and Dragon to join forces to take them down.
At first, their relationship might be a bit tense. Luffy is a carefree pirate, while Dragon is a serious revolutionary. But as they start to talk, they could find common ground in their desire to fight against injustice. Luffy's simple and direct approach to righting wrongs might earn Dragon's respect, and their relationship could gradually turn into one of mutual admiration.
Perhaps Luffy and his crew land on an island that is being used as a base by Dragon's revolutionary army. Luffy, being his curious self, starts exploring and eventually meets Dragon. They could have a conversation about their different but somewhat similar goals. Luffy's goal of finding the One Piece and becoming the Pirate King, and Dragon's goal of overthrowing the corrupt world government. This meeting could lead to an alliance of sorts, with Luffy's crew and Dragon's army working together on a common cause for a short time.
The World Government could be the main antagonist. They see both Luffy as a growing threat to their rule as a pirate and Dragon as a revolutionary. When Luffy and Dragon meet, the World Government might send their strongest agents like the Admirals to stop them from joining forces. The World Government's strict control over the world and their desire to maintain the status quo would put them in direct opposition to Luffy and Dragon.
Well, it could be that Luffy tries to recruit Whitebeard into his crew. Luffy is always on the lookout for strong allies, and Whitebeard with his immense power would be a great addition. However, Whitebeard might laugh it off, seeing Luffy as a young and brash pirate with big dreams but still a lot to learn.
One idea could be that Dragon is on a secret mission when he accidentally crosses paths with Luffy. Luffy, being his usual curious self, wants to know more about this mysterious man who seems so powerful. Another plot could involve Dragon saving Luffy from a powerful and unexpected enemy, and in the process, they start to bond over their shared sense of justice. Maybe Luffy could also learn some new skills or gain some valuable knowledge from Dragon during their encounter.
A good dragon luffy fanfic often has a unique plot. For instance, if it combines Luffy's carefree nature with the mystery and power of dragons in a new way. It should also stay true to the original characters' personalities. Luffy's determination and his love for his crew should still be there, even with the dragon - related elements added.
Sure. There are fanfics where Luffy teams up with a dragon character. They might go on a journey together to find a hidden treasure or fight against a common enemy. The dragon could have its own unique abilities, like flying, which helps Luffy reach places he couldn't before.
Luffy would probably still value his friends above all else. However, as a Celestial Dragon, he might have more power at his disposal. This could make him a bit more confident in his actions, but also more responsible. He might feel the need to use his influence to protect not just his crew, but also the oppressed people he meets, in a more official way.