Niki is another underrated character. If there was a crossover with a fairy - tale world, she could be a powerful fairy or a kind - hearted witch. Her baking skills could be turned into magical potions or enchanted treats. She has a lot of depth to her character that could be explored in a different setting.
Well, they could cross over with characters from other Nickelodeon shows like the Winx Club. The fairies from Winx Club could interact with Shimmer and Shine, sharing different kinds of magic. They could have a magical battle together against a common enemy.
A crossover with a fantasy - themed story like 'Lord of the Rings' could be amazing. Imagine the Dream SMP characters in Middle - earth. Tommy could be like a young hobbit getting into all sorts of mischief, and Dream could be a sort of dark wizard - like figure. They'd have to deal with orcs, trolls, and all the other classic LOTR threats.
Some of the key characters are Dream, TommyInnit, and Tubbo.
Antoine could be a great character to focus on more. In Sonic SatAM crossover fanfiction, he could have a character arc where he overcomes his cowardice in a new and unique way. Maybe in a crossover with the Archie Sonic comics universe, he could learn some new combat skills from the more battle - hardened characters there.
A cool plot might be that the BNHA villains discover the Dream SMP and see it as a new place to expand their evil plans. They kidnap some of the SMP members thinking they can use them for something. The SMP members then team up with the BNHA heroes to fight back. Techno could use his combat skills and the BNHA heroes would be amazed at his fighting style without having a Quirk. And the SMP members could learn about the importance of working as a team like the BNHA heroes do.
The old hermit character. He was only in a few scenes but seemed to know a lot. Fanfiction could explore his past and how he came to have his knowledge. There's also the young apprentice who was often overlooked. He might have some hidden powers or a special connection to the treasures that could be delved into.
One underrated character is Baltus Van Tassel. He's Katrina's father and has a big role in the town. Fanfiction could explore his backstory, like how he came to be such an important figure in Sleepy Hollow. Maybe he had some adventures in his youth that are related to the Horseman legend. Another is the schoolmaster before Ichabod Crane. What was his experience in Sleepy Hollow? What did he know about the Horseman that he might have passed on to Ichabod? And then there's the old woman who lives on the outskirts of town. She might seem like a minor character, but she could be a seer or have some connection to the supernatural forces in Sleepy Hollow.
The Wasp. She is a powerful and intelligent character. A fanfiction could center around her leadership skills within the Avengers. Maybe she has to lead the team in a situation where all the big - name heroes are incapacitated. It would show her strategic thinking and her ability to inspire others.
The stable hands who take care of the dragons often get overlooked. They have a unique perspective as they interact closely with the dragons on a daily basis. Fanfiction could explore their lives, their dreams, and how they view the dragon riders.
Agent Madani is also somewhat underrated. Fanfiction could show more of her backstory and how she really feels about working in a world full of crime and violence. She could be given more complex relationships with other characters, not just Frank. For example, her interactions with other law enforcement agents or even some of the criminals she has to deal with.