A third idea is that Princess and Logan are both exiled from Albion. They find themselves in a strange new land and have to rely on each other to survive. Along the way, they discover secrets about their family and the true history of Albion that was hidden from them. This could lead to a redemption arc for Logan as he realizes the errors of his ways.
One plot idea could be that Princess and Logan are forced to team up to save Albion from a new, unseen threat. Maybe a dark magic has started to corrupt the land and they have to put aside their differences. They start off distrusting each other but as they face challenges together, they begin to understand each other's motives better.
Another plot could be a time - travel fanfiction. Princess travels back in time and meets a younger Logan before he has become so power - hungry. She tries to change his path, but in doing so, she risks changing the entire future of Albion. This would involve a lot of character development as they interact in this new timeline.
One idea could be that Logan is a commoner who discovers he has a special power that is connected to the princess in Fable 3. They meet by chance when the princess is on a quest to find a solution to a dark magic that is plaguing the kingdom. Logan uses his power to save the princess from a dangerous creature, and from there, a bond begins to form between them as they work together to save the kingdom.
One idea could be that Logan, a commoner in the world of Fable 3, saves the princess from a dark magic spell. As he breaks the spell, they start to have a connection. He then accompanies her on a journey to restore peace to the kingdom which has been ravaged by the aftermath of the spell. Along the way, they face challenges that test their relationship and grow closer.
One idea could be a story where Logan, who is often seen as the antagonist in Fable 3, has a change of heart due to the influence of the princess. X could be a mysterious force or item that brings them together. For example, the princess discovers that Logan has been secretly trying to protect the kingdom from a greater threat that no one else is aware of, and X is the key to unlocking the truth about this threat.
A great plot could be that a new threat emerges that targets both magic - users and mutants. Harry and Logan are brought together by a mutual acquaintance who believes that their combined abilities are the key to stopping this threat. Along the way, they learn from each other's worlds, with Harry teaching Logan about magic spells for protection and Logan showing Harry some of his survival and combat techniques.
X could play the role of a catalyst. For instance, if X is a magical amulet that Logan discovers. He initially wants to use it for his own gain but then realizes that it could be a powerful tool to help the princess save the kingdom. This realization makes him change his attitude towards the princess and they start to work together.
Next, build on their shared experiences. If they are on a journey together, show how they react to the same situations differently. Maybe they come across a poor village. The Princess immediately wants to help, but Logan is more skeptical. As time passes, show small changes in their views due to each other's influence. For Logan, he might start to see the value in the Princess's kindness. For the Princess, she might understand Logan's need for power as a result of his insecurities.
For Logan, you can start by giving him a backstory. Maybe he had a tough childhood that made him strong and resourceful. His actions in the fanfiction can then be influenced by this past. For the princess, show her growth from a sheltered royalty to a strong leader. She could learn from Logan's street - smart ways and he could learn about courtly manners from her.
If Logan is a warrior and the princess is in need of protection, he could be assigned to guard her. At first, they might not get along well. The princess could find Logan too rough around the edges, and Logan might think the princess is too pampered. But as they face battles together, Logan sees the princess's courage and intelligence in strategic planning, and the princess sees Logan's loyalty and selfless acts of protection. This mutual admiration can lead to a deeper relationship.
One plot idea could be that Rogue and Logan discover their baby has a unique mutant ability that they need to protect from a group that wants to use it for evil. Another could be the baby getting lost in a dangerous mutant - friendly area and Rogue and Logan have to search for it while facing various challenges along the way. And a third idea might be that the baby is sick and they have to find a cure, which leads them to explore different parts of the mutant world they've never been to before.
One idea could be that Veronica and Logan are new parents and they struggle with the lack of sleep. They have to learn how to take care of the baby while also dealing with their own relationship issues. For example, Logan might be worried about providing enough for the family financially, and Veronica has to balance her career aspirations with motherhood.