Friendship - turned - love is also quite common. They begin as comrades or reluctant allies and as they spend more time together, their relationship deepens into something more romantic. This progression is seen in a lot of 'hanzo x mcree fanfiction' as it adds an interesting dynamic to their characters.
I've heard of 'A New Alliance' in the 'hanzo x mcree fanfiction' realm. It's interesting because it not only focuses on their relationship but also on how they influence the Overwatch team as a whole. Their partnership is shown to be a catalyst for change within the group, which makes for a great read.
One common theme is the clash of their cultures. Hanzo is from a very different cultural background compared to Sonya. Their different values and ways of life often create interesting dynamics in the stories.
One common theme is redemption. Hanzo, who has a lot of guilt for what he did to Genji in the past, often goes through a journey of redemption in these fanfictions. Another theme is family reconciliation, as they are brothers.
One common theme is redemption. McCree and Hanzo both have complex pasts, and many fanfictions explore how they find redemption through their relationship. Another theme is trust. Since they come from different backgrounds in the Overwatch world, building trust is a big part of their stories.
One common theme is the healing of emotional wounds. Hanzo has a lot of past traumas, and Mercy, with her kind and nurturing nature, can be depicted as helping him overcome those. For example, she might help him come to terms with his actions in the Shimada clan.
One common theme is redemption. Hanzo often has a past he's trying to atone for, and mccree can be a part of that journey. For example, in many fanfics, mccree helps Hanzo see that he can move forward from his past mistakes.
A common theme is the clash and then the melding of their different cultures. McCree represents the wild west sort of cowboy culture, while Hanzo has his traditional Japanese heritage. Their fanfics often explore how these two different worlds come together.
One theme that shows up a lot is her relationship with her family in this new gender - bent context. How does she interact with her father or brother? Also, the theme of redemption can be present. Maybe she has made mistakes in the past and is now on a journey to make things right, just like the male Hanzo in the original lore has his own path of redemption.
One common theme is mentorship. Hanzo, with his vast experience, could be seen as a mentor to Jacqui in some fanfictions. For example, he might teach her some special fighting techniques.
One common theme is family and reconciliation. Since they are brothers, many fanfics focus on how they can overcome their past and reunite. Another theme is redemption. Hanzo, in particular, is often depicted on a path to redeem himself for what he did to Genji. Also, honor and the Shimada clan's legacy play a role as they both are part of this important clan.