Well, they could introduce new colleagues at their workplace. For example, a new detective who is a bit of a wildcard and causes some interesting situations for Steve and Kono. This new character could bring in new cases and also some comedic relief.
They might also introduce an old friend of Steve's from his military days. This friend could be in some kind of trouble and Steve and Kono have to help him out. It would show Steve's loyalty and also how their married life is affected by his past connections.
They might have a very adventurous married life. Since they are both part of Hawaii Five - 0, they could continue to solve crimes together while also dealing with the normal ups and downs of a relationship. For example, Steve's often - impulsive nature might sometimes clash with Kono's more level - headed approach, but they would work through it because of their deep love and respect for each other.
Another storyline could revolve around their relationship growing stronger as they face external threats together. Maybe there's a criminal who has a vendetta against them and they have to rely on each other more than ever to stay safe.
The wedding would be a big celebration with all their Five - 0 team members present. There would be lots of music and dancing. Hawaiian music would fill the air, and everyone would join in the hula. The food would be a mix of local Hawaiian delicacies and some of Steve and Kono's favorite dishes from their travels.
Perhaps in the fanfiction, they decide to start a family right away. But there are complications. Kono has some concerns about her ability to balance being a mother and still being part of Five - 0. Steve is very supportive, and they go through a journey of trying to make it all work. There could be some drama with their friends and colleagues as they adjust to the idea of Kono and Steve becoming parents.
I've read a few Steve and Kono pregnant fanfictions. In one, the pregnancy was a surprise and it led to a whole new adventure for them. It showed how their relationship deepened as they prepared for parenthood. Another one was more about the challenges they faced, like Kono's health issues during the pregnancy and how Steve supported her through it all.
There would be a deeper emotional connection. They are no longer just dating or in a relationship but are committed for life. This would mean they trust each other even more and are more open about their feelings. Steve might become more protective of Kono, and Kono would be more involved in Steve's personal life decisions. They would also have to deal with the expectations of their families and friends as a married couple.
One character could be Seth Clearwater. As a member of Jacob's pack, he could play an important role in their married life. Maybe he helps them out in times of trouble or is like a younger brother figure to their family.
There could be a fanfiction where Kono and Steve find out about the pregnancy in a very dramatic way. Maybe during a dangerous mission, Kono starts to feel unwell and later discovers she's pregnant. This could add a whole new layer of tension and emotion to their relationship.
Hermione would be a great addition. She could help Harry and Molly with any research they need to do, whether it's about magic spells or historical wizarding knowledge. Neville could also be introduced. He might befriend them and together they could work on projects to improve the wizarding world, like creating new spells for protection or better ways to grow magical plants. Additionally, Luna Lovegood could pop in from time to time with her unique insights and odd magical creatures.
A possible plot could be that Kono and Steve are trying to keep the pregnancy a secret from the bad guys they are investigating. They fear that the criminals might use Kono's pregnancy as a way to get to them. So they have to be extra careful in their daily lives and on missions.