There might be a fanfiction where Voldemort discovers Snape's true loyalty is not fully with him. This could lead to a really tense showdown between them. Snape would have to use all his skills in magic and deception to survive. Maybe he has to convince Voldemort that he was only pretending to be against him to gain more information for the Dark Lord.
One possible reason could be that Snape fails to deliver crucial information. Voldemort is a very demanding and unforgiving master. If Snape doesn't give him accurate details about the Order of the Phoenix's plans, for example, Voldemort would surely be enraged and punish him.
Another interesting plot could be a backstory about how Snape first got involved with Voldemort. Maybe it was out of a thirst for power initially, but then his views changed over time. This could be delved into in great detail, showing his transformation from a potential dark wizard follower to a hero in the fight against Voldemort.
The main thing that makes Snape vs Voldemort fanfiction interesting is the contrast between the two characters. Snape is complex, with his own motives and a hidden side. Voldemort is pure evil. So when they interact, there are always mind games and power plays. For example, Snape has to constantly deceive Voldemort, and the tension this creates is exciting.
In some fanfictions, Snape might be working with Voldemort because he has been blackmailed. Voldemort could have found out some deep, dark secret about Snape and is forcing him to cooperate. This could be related to Snape's past or something he has done that he doesn't want to be made public.
In fanfiction, Snape's relationship with Voldemort is often complex. Snape was a double - agent, so on the surface he seemed to be loyal to Voldemort. But in fact, he was working for Dumbledore. This creates a lot of tension in their relationship in fanfictions. Some fanfictions might explore how Snape managed to deceive Voldemort for so long, and the psychological stress he endured while being in such a precarious position.
In fanfiction, Snape's relationship with Voldemort is full of mystery. Snape was a Death Eater, yet he was also Dumbledore's man. His relationship with Voldemort was based on lies and deception from Snape's side. This makes for great story - telling in fanfiction. Writers can explore how Snape walked the thin line between loyalty to Voldemort (as far as Voldemort knew) and his true mission for Dumbledore.
Yes, there are some fanfictions with such out - of - the - box concepts in the Harry Potter fanfiction community. However, these are not in line with the original story's canon.
There are fanfictions that explore Snape's relationship with Voldemort in a more psychological way. For example, delving into how Snape's past experiences with Voldemort shaped his actions throughout the series. Maybe Snape has to face some of his darkest memories related to Voldemort and overcomes them in a unique way in the fanfiction.
Harry Potter often features prominently. His relationship with Snape is complex in the original series, and in fanfiction involving Snape and Voldemort, his role can be further explored. For example, how he reacts to Snape's interactions with Voldemort and whether he can figure out Snape's true motives sooner.
One interesting plot idea could be that Snape discovers a hidden weakness of Voldemort. Maybe it's a long - forgotten spell that can counter Voldemort's most powerful dark magic. Snape, using his extensive knowledge of the dark arts and his own skills as a wizard, decides to face Voldemort alone to end the reign of terror. Another plot could involve Snape having to team up with some unexpected allies, like a group of students he has been secretly training, to take on Voldemort.