A plotline might involve the dentist being involved in some sort of illegal or immoral business on the side. For example, they could be stealing dental supplies and selling them on the black market, all while maintaining their normal dentist facade during the day. And their dark side could gradually be revealed as the story progresses.
One possible plotline could be that the dentist has a secret addiction to causing pain rather than relieving it. Maybe they use their position to experiment on patients in unethical ways.
One possible plotline is that Superman is tricked by an alien race into believing that Earth is a threat to the universe. So, he decides to use his powers to stop Earth from 'causing harm', which is really him going to the dark side as he's misinformed.
I'm not sure which specific 'a dentist with a dark side fanfic' is available. You could try searching on some fanfic websites like Archive of Our Own. They might have various stories with this theme.
Well, it could involve secrets from the dentist's past that come back to haunt them. Maybe they have a hidden addiction or a history of unethical practices.
It could be that Ashoka is influenced by a powerful Sith lord who preys on her insecurities. The Sith lord might manipulate her emotions, making her doubt her own strength and the right path. Over time, she starts to embrace the teachings of the dark side, like using anger as a source of power. Her relationships with her former Jedi friends would then become strained as she drifts further into the darkness.
One possible plotline could be that after facing great losses and betrayals, Leia starts to question the light side's values. Maybe the death of a close friend or the destruction of something she holds dear makes her vulnerable to the temptations of the dark side. She might then begin to explore the power that the dark side offers as a means to gain control and revenge.
One possible plotline could be that Batman is tricked into joining the Dark Side. Maybe the Joker uses some elaborate mind - control device or false information to make Batman believe that the Dark Side has the right way to bring true justice to Gotham. For example, he could be made to think that by using more extreme and violent methods, he can finally stop all the crime in the city once and for all.
One possible plotline could be that Ahsoka feels betrayed by the Jedi Order. Maybe she discovers some dark secrets within the Order that make her lose faith in the light side. This could lead her to be lured by a powerful Sith Lord who offers her a new way of seeing things, and slowly she starts to embrace the Dark Side, using her skills in new and more aggressive ways.
One possible plotline could be that Rey finally succumbs to the dark side under Kylo Ren's influence. He might train her in the ways of the dark side, leading them to rule the galaxy together with an iron fist. Maybe they start by taking over the First Order and using its resources to spread fear and chaos.
Another plotline could be that the west is a place full of chaos and Naruto sees himself as the solution. He starts to build his own empire with his own set of laws and values. However, his methods might be controversial. He could be facing internal rebellions within his new domain as well as external threats from the other ninja villages who see him as a threat to the balance of power in the Naruto world. The story could be about his struggle to maintain his rule while also dealing with his own inner demons.
One possible plotline could be that a lost traveler stumbles into the dark dark wood and has to find their way out while facing various obstacles like thick undergrowth and strange noises.