The impact would be huge. First, the Straw Hat crew would be devastated. They would likely lose their motivation and purpose. Zoro might go on a vengeful spree. Also, the whole world of pirates would be shaken. Luffy was seen as a rising star, a symbol of hope for many. His death could lead to a power vacuum that other pirates would fight to fill.
The other characters' development would be completely derailed. For example, Chopper, who looked up to Luffy as a source of inspiration, would probably lose his confidence. Robin, who had found a new family in the Straw Hats with Luffy as the core, might isolate herself again. Without Luffy, the bonds that held the crew together would start to crumble, and their individual character growth would be stunted.
In this fanfiction, Ace, Luffy and Sabo could have a future in Marineford that is full of hope. Maybe they work together to change the perception of pirates in that place. Ace could use his fire power to protect the weak, Luffy with his unwavering will continues to inspire others, and Sabo with his intelligence devises plans to make Marineford a more inclusive place for both pirates and marines.
Adventure is also common. They are pirates after all. Fanfictions might take them on new quests or have them explore uncharted islands together, much like in the original series. For example, they could be searching for a hidden treasure that has a special meaning to their family. It's a way to continue the spirit of adventure that One Piece is known for in a new context.
The popularity also stems from the fact that there are so many unexplored aspects of their relationship in the official story. Fanfiction allows writers to fill in those gaps and create stories that satisfy the fans' curiosity. For example, their early days together or how they would interact in different settings.
Luffy, the rubber - man with a big heart and even bigger dreams in One Piece. His brother Ace was like a role model to him in some ways. Ace had a complex backstory being the son of Gol D. Roger. He found a family with the Whitebeard Pirates. Sabo was the one who they shared their childhood with. The three of them had a pact. But then the tragedy at Marineford happened. Ace's death was a huge turning point for Luffy. It made him stronger in a way. Sabo then re - entered the story, with his own power and purpose, all of their stories intertwined as Luffy continues his journey towards the One Piece, facing numerous challenges along the way.
Luffy, Ace, and Sabo's story begins in their childhood. They were all orphans in a sense, and they formed a strong bond. Ace was the first to set out on his pirate journey. Luffy followed suit with his own grand plans. Sabo was also part of their group until an incident made them think he was dead. Ace joined Whitebeard, and his loyalty was unwavering. His death was a tragic event that affected Luffy deeply. Sabo then reappeared, with his own set of skills and determination. Their full story is a tapestry of love, loss, and the pursuit of the ultimate pirate dream. It shows how their relationships shaped their individual paths and the overall narrative of One Piece.
Well, Luffy grew up idolizing pirates. Ace was already a tough and respected pirate when Luffy was still a kid. Sabo was from a noble family but yearned for freedom. They became sworn brothers, sharing their dreams. Ace was a member of the Whitebeard Pirates. Luffy, on his journey, constantly faced challenges and grew stronger. When Ace was captured and set to be executed, Luffy rushed to save him, but couldn't prevent his death. Sabo then took on some of Ace's responsibilities and became an important figure, fighting for justice and freedom just like they always planned as kids.
A common theme is also the exploration of their physical attraction. Writers might describe how they notice each other's bodies in a different way than just the normal brotherly concern. For instance, Ace might be captivated by Luffy's carefree nature and how it's reflected in his movements and expressions, which then leads to a physical attraction. This can be a starting point for a more in - depth romantic relationship in the fanfiction. There could also be themes around jealousy, like if another character shows interest in Luffy, Ace would feel jealous in a romantic way.
One good 'One Piece Ace x Luffy fanfiction' is 'Brothers in a New Light'. It explores their relationship in a different AU (alternate universe) where they face new challenges together. The story focuses on how their bond remains unbreakable even in the face of unexpected situations.