One possible plot could be that Voldemort's lover discovers his true dark nature and decides to leave him. This shatters Voldemort as he realizes he has lost the one person who saw something good in him. It could lead to a downward spiral in his character, making him even more bitter and vengeful towards the world.
Perhaps his lover is killed by his enemies as a way to get to Voldemort. He then has to deal with the grief and guilt. He might start to question his own actions and the path he has chosen, which could be a very interesting exploration of his character, as we usually see him as a purely evil entity.
It could be that his lover was a powerful witch or wizard who was trying to reform Voldemort. But the pressure from his Death Eaters and his own inner darkness prove too much, and she leaves him. This loss then makes him more determined to prove that his way is the right one, leading to more chaos and destruction in the wizarding world.
Another option could be a Muggle - born witch. Voldemort might have been intrigued by her in a different way compared to his hatred for most Muggle - borns. But as his views on pure - blood supremacy become more extreme, she can't bear to be with him any longer, and their relationship ends.
Maybe his lover was killed by his enemies. Voldemort, despite being a dark wizard, had deep feelings for this person. His loss could make him go on a rampage to seek revenge against those who took his lover away. He might also start to question his own actions and the path he has chosen in life.
It could be that Naruto discovers some dark secrets about his past, like his parents were actually killed by the very people he trusted in the village. This revelation is so shocking that it shatters his mental state. He becomes a completely different person, losing his sense of right and wrong, and his sanity along with it.
Maybe in the fanfic, there's a powerful villain who has a device that can nullify superpowers. Beast Boy gets caught in the range of this device and loses his powers. He struggles with feelings of uselessness at first. But then he realizes that his skills as a strategist and his knowledge of the Titans' operations are still valuable, and he uses those to help the team in a different way while also searching for a power restoration method.
One idea could be a fanfic where Voldemort's lover is a powerful witch who tries to redeem him. She sees the good in him that no one else does and attempts to turn him away from the dark path. They could have secret meetings in the Forbidden Forest, sharing their deepest desires and fears.
Well, one possible plot could be that Naruto is cursed by an enemy during a battle. This curse takes away his voice. As a result, he has to find new ways to communicate with his friends and allies. Maybe he starts using sign language, which he has to learn quickly. This could lead to some really interesting character development as he struggles to convey his thoughts and emotions without speaking.
One possible plot could be that Naruto is put under a powerful genjutsu. This genjutsu messes with his mind and slowly drains his emotions. As a result, he becomes detached from his friends and his sense of purpose. He no longer shows excitement for training or fighting, and his usual determination fades away.
Well, perhaps it's set in a post - apocalyptic world. Carl is in a fight with some bad guys, and during the struggle, he loses his eye. The fanfic could focus on his journey to get revenge while also learning to live with his disability.
Maybe in the fanfic, Harry loses his temper when he discovers someone has betrayed his trust, like a false friend who leaked his secrets.
In this fanfic, it might be that Percy is in a high - pressure situation like a really difficult quest. Things keep going wrong, his team isn't listening to his plans, and he just loses his temper out of frustration. He starts yelling at his teammates, accusing them of not taking things seriously enough.