An alternate ending could be that the Huntsman sacrifices himself to save Snow White. He could step in front of a fatal blow meant for her, and in his dying moments, Snow White realizes just how much he means to her. This would be a tragic yet powerful ending, showing the depth of their connection.
If there was a lemon fanfiction of 'Snow White and the Huntsman', it might take the form of a re - imagining of their story with a stronger focus on their physical and emotional attraction. It could be a story that dives deeper into the unspoken tension between them. Instead of just the typical adventure and power struggle against the Evil Queen, their relationship could be at the forefront, with new situations and challenges arising from their budding and perhaps more 'spicy' connection.
One idea could be that the Huntsman is from a different realm in the fanfiction. He has unique powers from that realm which he uses to protect Snow White in new and unexpected ways. For example, he can communicate with magical creatures that are native to his home realm and they help him in battles against the Evil Queen.
First, it's important to note that if by 'lemon' you mean something with adult or inappropriate content, that's not advisable as it goes against many ethical and community standards. But if you mean a more 'flavorful' and unique take on the relationship between Snow White and the Huntsman, start with a deep understanding of their characters from the original story. Think about what could have been different in their interactions. For example, you could add more scenes of them alone, talking about their hopes and fears which could lead to a deeper emotional bond.
One interesting aspect in Snow White and the Huntsman fanfiction exploring the darker side could be delving deeper into Ravenna's backstory. Maybe she had a tragic past that led her to become so power - hungry. For example, she could have been wronged by someone in her youth, which made her believe that only absolute power could protect her. This would add more layers to her character and make her more than just a one - dimensional villain.
A powerful dark wizard from another land could be the main antagonist. He could be after Snow White for some unknown but dark purpose. Maybe he wants to use her pure heart to power a spell that will give him ultimate control over all the kingdoms. And he could be the one who has also wronged the Huntsman in the past, so the Huntsman has a personal vendetta against him as well.
The OC could be a fellow captive of the Mirror's evil plans. In this case, they would bond over their shared experience of being targeted by the Mirror. They could support each other, with the OC using her unique abilities to help Snow White escape from the Mirror's clutches. For example, if the OC has the power of invisibility, she could use it to spy on the Mirror and gather information to help Snow White.
One main theme is the battle between good and evil. Snow White represents good, while the evil queen is the antagonist. Another theme could be self - discovery. As Snow White embarks on her journey, she discovers her own strength and power.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). They have a large collection of fanfictions, and you can use their search filters to specifically look for Snow White and the Huntsman fanfictions with a Rated M tag. This will narrow down your search to the ones that are more mature in nature.
There are fanfictions that might focus on the Huntsman's past in a Rated M context. Maybe it reveals his dark secrets or his experiences before meeting Snow White that shaped him into the person he is. This could involve his time in the army or his relationships with other characters in his past. These elements add layers to his character and can make for an interesting read.