One challenge could be balancing their work at Planet Express with their new married life. With all the dangerous delivery missions, they need to make sure they also have time for each other.
They might face challenges from their different backgrounds. Fry is from the past and has a very different upbringing compared to Leela. This could lead to some misunderstandings in their relationship, like differences in values or how they view family.
In some fanfiction, Fry and Leela's wedding could be a grand affair across different planets. They might invite all the alien species they've encountered. Fry, being the sweet guy he is, could write his own vows about how Leela has been the one constant in his crazy future life. And Leela, with her tough exterior but soft heart, would have a moment of pure vulnerability as she says her vows.
Family acceptance could be a big issue. Danny has his human family and friends, and they might not be too accepting of Ember at first. Ember also has her own 'ghost family' in a sense. Merging these two worlds could be difficult. There could be misunderstandings and conflicts. Also, they would have to figure out where to live. Should it be in the human world, the Ghost Zone, or some in - between place? This decision could cause a lot of stress and arguments.
One challenge could be cultural differences. Marco is from Earth and Hekapoo from another dimension. Their ways of life, traditions, and even values might be different. For example, how they celebrate holidays or raise children if they decide to. Another challenge could be jealousy from others. Hekapoo might have admirers in her dimension who don't like that she's married to an Earthling. And Marco might face some envy from people on Earth who don't understand his relationship with a magical being.
In the fanfiction, after getting married, they may face challenges in terms of leadership. They need to make decisions together for the good of Narnia. But their different perspectives - Caspian's Narnian - born knowledge and Lucy's insights from her own world - might sometimes clash. Also, there could be external threats. Enemies might see their union as a weakness to exploit or a new power to fear. They would have to work hard to prove that their marriage strengthens Narnia rather than weakens it. And on a more personal level, they may struggle to find time for each other with all their royal duties.
Family could be a challenge. With their different backgrounds, their families might have different expectations. Maybe Dom's family expects them to settle down in a more traditional way, while Letty's family wants them to continue their high - octane adventures. This could lead to some tension between them and their families, and also between Dom and Letty as they try to please everyone.
One challenge could be trust issues. For example, if the victim was betrayed by a former partner through violence, they might find it hard to fully trust their new spouse. They might constantly be on edge, fearing that history will repeat itself.
A time - travel fanfiction could also be appealing to them. For example, Fry accidentally sends himself and Leela back in time to a crucial moment in Earth's history. They have to be careful not to change the course of history while also finding a way to return to their own time.
One challenge could be time management. A Catholic school teacher is often very busy with teaching, preparing lessons, and attending school - related events. After getting married, they need to balance their time between their family and work. Another challenge might be dealing with the expectations of the Catholic school community. For example, they may need to uphold certain family values in line with the Catholic teachings in both their personal and professional lives.
One challenge could be cultural differences. Konoha and Suna have different traditions and ways of life. For example, the Hyuga clan has its own strict family rules which might conflict with Suna's more laid - back approach in some aspects. Another challenge is the distance between their villages. Maintaining a relationship while being so far apart for official duties can be tough. Also, their friends and families may have different expectations. Hinata's family might be worried about her moving to Suna, and Gaara's council in Suna may have concerns about a Konoha - native being so close to the Kazekage.
Another challenge could be Naruto's duties as a hero in his world. He might be called away often to deal with threats. This could leave Shion feeling lonely or neglected at times. She would have to be understanding of Naruto's responsibilities, and Naruto would have to find a way to balance his duties and his married life.