The Giants could be great antagonists. Since Percy is now connected to Juno, they might see him as a key figure to target in their war against the gods. They could try to use his new identity against him and the other demigods.
One idea could be Percy having to prove his loyalty to Juno in a series of trials set by the Roman goddess. Another could be Percy discovering a long - lost prophecy related to his new status as Son of Juno and having to fulfill it to save both the Greek and Roman camps. Maybe he has to team up with some unlikely allies, like a group of minor Roman deities who are also trying to gain favor with Juno.
It's highly unlikely that there is a legitimate 'Percy Jackson' fanfiction with such a plot. The 'Percy Jackson' series is aimed at a relatively young audience, and this kind of plot is not only against the moral fabric of the series but also goes against the established mythology. In the Greek and Roman mythologies that the series is based on, Juno/Hera has a very specific role and set of relationships, and this scenario would be a huge deviation.
There are very few if any such fanfictions that would be considered appropriate or in line with the general themes of the 'Percy Jackson' series. The original series has a certain set of values and plotlines, and this idea goes against the nature of the characters as established in the official works.
No. In the official Percy Jackson series, Percy is the son of Poseidon. Fanfiction often takes creative liberties and creates alternate storylines, but these are not part of the original canon.
Yes, there are likely fanfictions out there with this concept. Fanfiction writers often explore alternative storylines and relationships. However, it goes against the canon as in the original 'Percy Jackson' series, Percy is the son of Poseidon. But in the world of fanfiction, anything is possible.
In most traditional mythologies, Percy Jackson is the son of Poseidon in the 'Percy Jackson' series, and Odin is from Norse mythology. But in fanfiction, anything can be reimagined. So, he could be depicted as the son of Odin in some very creative fan - made stories.
In fanfiction, the Son of Aphrodite could also have an interesting love life. Since Aphrodite is the goddess of love, her son might have a complex relationship with love. He could be a hopeless romantic, constantly falling in and out of love. Or he might be cynical about love, having seen the chaos it can cause, especially among the demigods.
Annabeth could be a strong ally. She has always been there for Percy, and even though his parentage has changed, her loyalty might still hold. Grover too. He's Percy's best friend and would likely stand by him no matter what. Another potential ally could be the Hunters of Artemis. Since Diana is another name for Artemis, they might see Percy as someone they need to protect and help, especially if he is involved in something that concerns the goddess.
Annabeth could be a great ally. She's smart and resourceful, and she could help Percy figure out the mysteries related to Sobek and his Egyptian connections. Her knowledge of architecture and strategy would be useful in any quests Percy undertakes.