One idea could be Ares getting involved in a conflict between two mortal kingdoms. He could secretly manipulate the events to test the strength and valor of the warriors. Another plot could be Ares falling in love with a mortal woman who is a great warrior herself, and he has to decide between his love for her and his duty as the god of war. Or perhaps a story where Ares has to team up with other gods to face a common enemy that threatens the balance of the world of war.
A plot could involve Ares creating a special group of elite warriors. These warriors are trained in a new and brutal form of combat that Ares has devised. However, the other gods become worried that this new form of war will get out of control and disrupt the order of the world. So, Ares has to either prove them wrong or find a way to control the situation. Another idea is a story set during a time when the world is on the brink of a great war. Ares is conflicted because he senses that this war will be so destructive that it might even endanger the existence of the gods. So, he tries to find a way to prevent it without losing his status as the god of war. Also, a fanfiction could focus on Ares' relationship with his family in the context of war. For example, how his father Zeus views his actions during a particular war, and how that affects their relationship.
One idea could be Bella going on a quest to find a powerful ancient weapon to defeat a new emerging dark force. She could face various challenges along the way, like traversing through a dangerous enchanted forest.
Perhaps a story where the God and Goddess of War have a sibling rivalry. They compete for the most powerful weapon in the war - realm, and in the process, they have to face various challenges and make difficult choices that test their loyalty to each other and their own beliefs.
One common theme is adventure. Joxer often gets involved in various adventures with Ares and other characters from the 'Goddess of War' universe. Another theme could be friendship or rivalry between Joxer and Ares.
To develop Ares, show his internal conflict. He's the god of war, but he could have moments of doubt about the destruction he causes. For example, after a particularly bloody battle, he might question if war is always the answer.
A plot could involve a prophecy that says only Artemis and Ares together can save Olympus from a great danger. Artemis is reluctant to work with Ares as she despises his blood - thirsty ways. However, as they journey to find the source of the threat, they gradually learn to respect one another. For example, Ares might show a different, more strategic side of himself to Artemis, and she might display her fierce loyalty and determination in a way that makes Ares see her in a new light.
A plot could involve Ares testing Percy in a series of challenges that are not just about physical strength but also about his mental and moral fortitude. For example, Ares creates illusions of Percy's friends in danger, and Percy has to make difficult decisions. This would explore Percy's character deeper and also show a different side of Ares as a sort of cruel mentor. Or perhaps a story where Percy is accidentally transported to Ares' domain during a battle, and he has to find a way to escape while also dealing with the war - crazed creatures there.
A possible plot could be a competition among the demigods where Percy, as a 'Son of Ares' in this fanfiction, has to prove himself against other powerful demigods. The competition could include tasks like combat, strategy, and survival challenges. Along the way, Percy could learn more about the Ares - like qualities within himself and also form new alliances or rivalries.
A really cool plot could be Percy getting caught in an alternate dimension where Ares is the main god in charge. He has to find a way to survive in this new world, where the rules are different and he's seen as an outcast. Percy would need to use his wits and skills to navigate this strange place and find a way back home.
A plot could revolve around a mortal who prays to both Ares and Athena simultaneously. The two gods are intrigued and descend to the mortal world. There, they find that the mortal's problem is a complex one that requires both war - like strategy and wisdom to solve. As they work together, they discover new aspects of each other and their relationship evolves.
One idea could be that Wonder Woman tries to redeem Ares. She believes there is some good left in him despite all his evil deeds. So she spends time with him, trying to understand his motives, which leads to a series of adventures where they face various threats together and in the process, Ares starts to question his own nature.