Well, in the context of fanfiction, the plot could be quite diverse. If Wanda is a unique character in this fanfiction, she might come from a mysterious island that has some sort of power related to lemons (as the 'Lemon' in the title might suggest some sort of unique element). The Straw Hats could encounter her and get involved in a race against other pirates or a secret organization to obtain this lemon - related power. This could lead to battles, alliances, and lots of character development within the crew as they face new challenges.
Since I'm not sure about specific 'One Piece Wanda Lemon' fanfiction, but generally in One Piece fanfiction, a plotline could involve new adventures for the Straw Hat crew. Maybe Wanda is a new character who has some special abilities and joins the crew on a quest to find a new treasure. Or perhaps she has a connection to an existing villain in the One Piece world and the story unfolds around that conflict.
It's hard to say exactly what the plotlines would be without knowing the specific fanfiction. However, if we consider the One Piece universe, it could be that Wanda is a long - lost relative of one of the main characters. The 'Lemon' part could be symbolic or related to a particular item or place. For example, there could be a lemon - shaped island that holds the key to a great power or a secret about the Void Century. And the story would revolve around the Straw Hats' journey to this island, their interactions with Wanda, and the revelations that come along the way. This would likely involve the usual elements of One Piece like action, friendship, and the pursuit of dreams.
One possible plotline could be Arlong and Luffy having to team up against a common enemy in a very unlikely alliance. This would force them to put aside their differences and learn to work together.
I'm not sure there are official or widely known 'One Piece Wanda Lemon' fanfictions. Fanfiction often varies widely in quality and content. You can try searching on some major fanfiction websites like Archive of Our Own or FanFiction.net, but be aware that not all content might be in line with the original spirit of One Piece.
One plotline could be that the Avengers are accidentally transported to the One Piece world. They have to find a way back home while also getting involved in the local conflicts. For instance, they might help the Straw Hats against the World Government. Another could be that Thanos has also found his way into the One Piece world and is after the One Piece treasure for his own evil purposes, so the Avengers and the Straw Hats have to join forces to stop him.
Maybe in some 'wanda hurts tony fanfiction', it's more of an emotional hurt. Wanda could accidentally reveal some of Tony's deepest secrets or traumas, causing him mental anguish. This could lead to a rift between them and the other Avengers having to deal with the fallout.
In some 'One Piece' pregnant fanfics, the plot could revolve around the idea of legacy. If a main character gets pregnant, it could be about the future of the pirate crew or the world of 'One Piece' in general. How will the child grow up? What kind of impact will the pregnancy have on the balance of power in the world? Maybe the unborn child has some sort of special power that is discovered during the pregnancy, and this leads to various factions trying to either protect or capture the mother and the child. There could also be a story about a character who was thought to be infertile getting pregnant, which could be a source of great joy and also potential danger as others may envy or want to harm the mother and child.
There could be a plotline where they get transported to a different dimension. In this new world, Zoro has to learn new sword techniques to fight the strange creatures. Sanji discovers new ingredients and has to adapt his cooking. Luffy befriends some of the locals and together they figure out a way to get back to their own world.
A single mommy in One Piece fanfiction could also be a marine. She might be struggling to balance her duties as a marine and raising her child alone. Maybe she gets assigned to a mission that involves an area where her child is in danger. She has to make tough decisions between following orders and protecting her family, and this inner conflict could be a major part of the story.
One characteristic is the creative expansion of the original One Piece world. It often takes the existing characters and settings and twists them in new and unexpected ways.
Well, one possible plotline could be that Ayane, for some reason, enters Naruto's world. Maybe she's on a mission or has been transported there accidentally. And then, through a series of events, they start to develop feelings for each other that lead to the more 'lemon' - ish aspects of the story. However, this would require a lot of world - building to combine their two different universes.
Perhaps in a 'naruto and elf lemon fanfiction', the elf has a special power that the Naruto world needs to defeat a new and powerful enemy. Naruto and the elf team up, and during their adventures, they start to develop feelings for each other. Their relationship could progress from friendship to something more, with some tender and a few more suggestive scenes as they get closer, like a shared moment under a starry sky where their relationship takes a new turn.