You could write a fanfiction where the ace of spades is a sentient being. It has its own thoughts and feelings and is trying to escape from a card collector who wants to keep it locked away. The ace of spades could team up with other cards to plan an escape and find a place where they can be free.
One idea could be exploring the backstory of the ace of spades. Maybe it was once a magical card in a hidden world of cards, and the fanfiction could tell how it got its special powers. Another could be a story where the ace of spades is a key to unlocking a secret portal. It could lead to a world full of adventures and mysteries.
One idea could be exploring the backstories of minor characters in the Ace Attorney series. For example, you could write about the life of a court clerk before they started working in the courthouse. Another idea is to create an alternate universe where the legal system has different rules. Maybe in this AU, evidence is presented in a completely different way.
The difference between the Ace of Spades and the Queen of Spades tattoo was that the Ace of Spades tattoo represented the biggest card in the suit of spades and also meant the best. The Queen of Spades tattoo represented the queen of spades, displaying strength and mysterious body art. These two tattoos were different in meaning and symbolism. They represented different concepts and images.
I'm not sure specifically as there could be many novels with that title. It might be about a journey related to the ace of spades card, perhaps in a game - related or superstitious context.
Perhaps in the fan fiction, the Jack of Spades has a love interest. It could be a character from another suit, like the Queen of Hearts. Their relationship would be complicated because they are from different suits with different loyalties. The story could revolve around how they overcome these differences and their respective duties to be together.
A great plot for Ace Combat 3 fanfiction might be to create an alternate timeline. In this timeline, a major battle from the game was lost instead of won. This would change the entire political and military landscape of the game world. Pilots would have to deal with a much harsher reality, and new alliances would have to be formed to survive. It could also explore how the characters would change in this new situation.
One idea could be a crossover where Naruto characters are pilots in the Ace Combat universe. For example, Naruto could be a hot - headed pilot with his unique chakra - based flying skills. Another idea is that the Akatsuki members are part of a rival squadron, causing chaos in the skies. Maybe Sasuke could be a lone - wolf type pilot who has his own motives and often goes against the orders of the main squadron.
One idea could be exploring how Luffy's unique rubber body affects his metabolism. Since his body can stretch, perhaps it requires more energy to maintain that elasticity, thus having a super - fast metabolism. Another idea is to incorporate Ace's fire - based abilities and how that might interact with Luffy's metabolism in a fanfiction scenario. Maybe the heat from Ace's powers could speed up Luffy's metabolism even more in a fight or during a challenging situation.
Well, a great Ace Attorney crossover fanfiction idea is to cross it with "Fullmetal Alchemist". Edward and Alphonse could be involved in a case where alchemy is misused and Phoenix Wright has to use his legal skills to uncover the truth. Also, a crossover with "My Hero Academia" would be cool. Heroes being accused of crimes they didn't commit and the Ace Attorney characters having to defend them in a world full of quirks. Or a crossover with "Sailor Moon", where the Sailor Scouts are involved in a legal battle and Phoenix Wright is there to fight for justice on their behalf.
Another plot could involve a group of pilots from different nations coming together to fight a common, mysterious enemy force that doesn't belong to any known country. Their different flying styles and cultures clash at first but they learn to work together for the greater good.
You could also write a fanfiction based on an alternate universe. For example, what if the characters were in a steampunk world? The courtroom scenes would be really unique with steam - powered gadgets and different social norms.