One challenge could be keeping their identities secret. Since they are superheroes, they have to protect their civilian identities as well as their superhero ones. Another challenge might be balancing their superhero duties with their married life. They can't always be there for each other because they are out saving the world.
They might face opposition from some of their friends or colleagues. Maybe some think they are too different or that their relationship will get in the way of their superhero work. Also, there could be financial challenges. Planning a wedding can be expensive, and they may not have a lot of money as superheroes. Plus, they might have to deal with the media if their relationship becomes public, which could put a strain on their marriage.
They might face challenges like cultural differences. Ranma comes from a more traditional martial arts family, while Ryoga has his own unique background. There could also be issues with their living arrangements. Ryoga is often lost, so he might have trouble getting home on time, which could cause arguments. And of course, their friends' reactions could be a challenge. Some friends might not accept their relationship easily.
One challenge could be public acceptance. Spiderman is a more street - level hero, often dealing with local crime in New York. Storm, on the other hand, is an X - Man and has a much larger, global - scale reputation. Their different fan bases might not be so accepting of their union at first. Also, their different power sources and how they use their powers could cause some frictions. For example, Spiderman's powers are a result of a scientific accident, while Storm's are mutant - based. They might have different views on how to use their powers in various situations.
One challenge could be communication. Dr. Whooves is very intellectual and might use complex scientific terms, while Derpy is more of a simple - minded, sweet pony. So, they may have trouble understanding each other at times. For example, when Dr. Whooves tries to explain his latest time - travel experiment, Derpy might get confused.
One challenge could be dealing with their different backgrounds. Shinichi is a detective, used to a life of solving crimes and being in the public eye to some extent. Shiho has a scientific background and a past in a secret organization. Their different ways of thinking and approaching problems might lead to some disagreements. For example, Shinichi might be more impulsive in his investigations, while Shiho would prefer a more calculated approach.
One challenge would be acceptance from their respective communities. The heroes might not accept Nightwing being involved with Harley, a former villain. And the villains might see Harley as a traitor for being with a hero. Another challenge could be protecting the pregnancy from their enemies who might want to harm them or use the baby for their own gain.
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.
One challenge could be dealing with their different clan cultures. Naruto is from the Uzumaki clan and Hana from the Inuzuka clan. Their traditions regarding family, festivals, and even child - rearing might be different. Another challenge could be Naruto's dangerous missions. Hana would be constantly worried about his safety, and Naruto would have to balance his duties and his new family life.
One challenge could be time management. They are both important figures in the fight against evil in the Voltron universe. So, finding time for each other between battles and diplomatic meetings would be tough. For instance, Keith might be called away on a dangerous mission right in the middle of their anniversary celebration.
One challenge could be acceptance from their respective villages. The Leaf village might be hesitant to fully accept Haku, given his past association with Zabuza. Similarly, the Hidden Mist might have reservations about Naruto, a Leaf ninja. Another challenge could be jealousy from other characters who might have had feelings for either Naruto or Haku. For example, some of Naruto's female friends in the Leaf village might not be happy about his marriage to Haku.