One interesting plot could be Percy having to face a new and powerful monster that is specifically sent by Zeus' enemies to test his worthiness as the so - called 'Champion of Zeus'. This monster could have unique abilities that force Percy to think outside the box and use his powers in new ways.
Another plot might involve Percy being caught in a political struggle among the gods. Since he is the Champion of Zeus, other gods might see him as a threat or a tool to use against Zeus. For example, Poseidon could be in a difficult position, being Percy's father and having to deal with the implications of Percy's new role in relation to Zeus.
A really exciting plot could be Percy traveling to a previously unknown realm under Zeus' command. In this realm, he discovers an ancient prophecy that not only affects his own fate but also the balance of power among the gods. He has to figure out how to fulfill the prophecy while also dealing with the challenges of this strange new world.
Another plot could be that the lemon is a symbol of a prophecy. Percy is tasked with understanding the connection between the lemon and Zeus in order to fulfill the prophecy. Along the way, he discovers secrets about his own heritage and the true nature of Zeus' power. This could involve Percy facing many challenges and making difficult choices.
Well, in some fanfictions, there could be a plot where Percy is challenged by an unknown entity to prove his worth as the champion of the hunt. This could involve him having to track down and defeat a series of increasingly difficult foes. Or perhaps a plot where Percy discovers a new aspect of his hunting abilities while exploring an ancient and dangerous forest. He might have to use these newfound powers to rescue his friends who are lost in that forest. It could also be that Percy is sent on a hunt to retrieve a powerful artifact that has been stolen by a rogue demigod, and the journey is filled with various obstacles and battles.
One interesting plot could be Percy having to face a new and powerful magical enemy that is immune to his usual water - based powers. So he has to quickly learn and master new forms of magic to defeat it.
There could be new characters introduced as allies. Maybe a demigod from a far - off camp who has special powers related to the sky, just like Zeus. This demigod could understand Percy's new role on a deeper level and they could team up to face the challenges together. Or perhaps an ancient spirit that was once bound by Zeus but now sees Percy as a way to freedom and in return offers its power and knowledge to Percy.
One interesting Zeus - Percy Jackson fanfiction could be about Zeus having to team up with Percy for a special quest. Maybe there's a threat that only their combined powers can defeat. In this story, Zeus might have to put aside his pride and work with a demigod, which would be a huge shift in his character.
Well, you could write a fanfiction where Percy Jackson is framed for a crime he didn't commit at Camp Half - Blood. As a champion, he has to prove his innocence while also dealing with the fact that some of his friends start to doubt him. He then embarks on a journey outside the camp, with only a few loyal friends by his side, to find the real culprit and clear his name. This could involve facing various mythological creatures and obstacles along the way.
One interesting storyline could be Hera and Zeus having to work together to save Olympus from a new, powerful threat. In this scenario, Percy Jackson might get caught in the middle. Maybe the threat is a primordial being that has awakened and only the combined power of Hera's cunning and Zeus's strength can stop it.
One possible plotline could be Percy having to face some new and terrifying monsters sent by Nyx's enemies. Since Nyx is a powerful figure, there would be many who oppose her, and Percy, as her champion, would be in the line of fire.
Maybe in the fanfiction, Zeus has left a hidden prophecy about his legacy that Percy discovers. This prophecy could involve a great power that is locked away and can only be accessed by following a series of dangerous quests. Percy then has to navigate through various challenges, including dealing with other gods who are either jealous or afraid of what this legacy might bring.
A great plot could involve Percy discovering a hidden power within him due to his relation to Zeus. He then has to learn to control it while also dealing with the envy of other demigods. For example, he might accidentally cause some chaos in the camp which makes others suspicious and jealous of his new - found abilities.