What are some interesting plots in Ben 10 x Midnight fanfic?

Another plot might involve Ben and Kai getting accidentally transported to a parallel dimension where things are very different. They have to find a way back home while also dealing with the strange new versions of their friends and foes. Along the way, they discover new things about each other and their feelings start to change in this unfamiliar setting.

Obviously, Ben Tennyson from Ben 10 is one of the main characters. He has the Omnitrix which gives him the ability to transform into different aliens. And Midnight is also a main character. But there could also be supporting characters from both the Ben 10 universe and Midnight's world, like Gwen from Ben 10 who might play a role in helping Ben and Midnight in their adventures.

One interesting plot could be Ben having to protect his vampire harem from other supernatural threats. Maybe a group of werewolves wants to drive the vampires out of their territory and Ben, with his alien powers, has to step in and defend them.

One interesting plot could be Ben traveling back in time to meet his younger self and having to hide his identity while trying to prevent a future disaster that his younger self unknowingly causes.

One interesting plot could be Jeff and Ben teaming up to face a common enemy in the Creepypasta world. Maybe a new, more powerful and menacing entity emerges that threatens their 'territory' or way of existence, and they have to put aside their differences to fight it.

In some fanfictions, there might be a plot where Ben has to save Jeff from a dangerous situation. For example, Jeff gets trapped in a haunted place and Ben, with his unique abilities, comes to his rescue. It could involve a lot of spooky encounters and tense moments as Ben tries to find and free Jeff.

Another plot could involve a magical accident that switches their personalities or powers. This would lead to humorous and challenging situations as they have to adapt to each other's roles. Harry might struggle with the responsibility that comes with Ben's position while Ben has to deal with Harry's more unruly reputation among the pirates.

Another interesting plot could be that some of Ben's alien forms are mistaken for new mutants in the Marvel Universe. He then has to prove that he's not a threat while also helping the X - Men deal with a common enemy that is interested in the genetic makeup of both mutants and Ben's alien forms.

One idea could be a story where Ben and Kevin have to team up against a new, powerful alien threat that neither of them can face alone. They have to combine their powers and skills in unique ways.

Perhaps Ben, while exploring a new planet in his travels, stumbles upon a world that has a very Avatar - like culture and power system. He has to learn to use their ways in combination with his alien forms to survive. For example, using Heatblast's heat powers in a more refined way similar to firebending.