Well, in Ben 10au fanfic, the idea of a changed Omnitrix is quite fascinating. Maybe it has new functions or unlocks different types of aliens that we haven't seen in the original. And then there are the fan - created villains that are designed specifically for this alternate universe. They can bring fresh challenges to Ben and his friends. Additionally, the settings in the AU might be different, like a post - apocalyptic world where Ben has to use his powers in unique ways to survive.
One interesting concept could be alternate versions of the aliens. For example, different forms or powers for the classic Ben 10 aliens. Another could be new storylines that deviate from the original series, like a darker take on Ben's adventures where the stakes are much higher. Also, the exploration of different relationships between the characters in this AU can be really engaging.
In Ben 10au fanfic, a really interesting aspect is how the characters' personalities can be tweaked. Ben might be more serious or have different moral compasses. The fanfic could also introduce new side characters that interact with the main cast in unexpected ways. For instance, a new alien race that teams up with Ben against a common enemy. Moreover, the power - up mechanics for the aliens could be different. Instead of the normal evolution in the original series, there could be power - ups based on the environment or specific tasks in the AU.
One interesting concept could be exploring new alien forms that Ben hasn't discovered in the original series. For example, an alien with the power to manipulate time on a small scale. Another could be delving deeper into the relationships between Ben and his friends, like how they handle a really tough situation together. Also, some fanfics might explore alternate universes where Ben's powers work differently or where he has different enemies.
In 'ben 10 dial fanfic', there might be concepts related to different storylines in alternate universes. For example, a universe where Ben Tennyson is a villain instead of a hero. This would flip the whole dynamic of the original story and lead to all kinds of new and exciting plot twists. Also, there could be ideas about new functions for the Omnitrix dial, like being able to combine alien forms or unlock hidden powers that were not present in the original series.
In 'ben 10 body swap fanfic', the exploration of different alien forms in the wrong bodies is cool. Say, if Heatblast ended up in Four Arms' body. The way the powers would be used differently due to the body's physical capabilities would be really interesting. There could be new ways of fighting villains or even just interacting with the environment that we haven't seen before in the original series.
In 'ben 10 body switch fanfic', the idea of character development is quite engaging. As they adapt to the body switch, they might learn more about themselves and others. They could discover hidden strengths or weaknesses in their new forms. Also, relationships between characters can change significantly. Friends might view each other differently, and enemies might gain new insights into their foes. This can create complex and dynamic storylines.
One interesting AU could be a world where the Triwizard Tournament is open to all years. This would change the dynamic completely as younger students might participate, bringing in different skills and strategies. Another could be an AU where Voldemort never came back in the fourth year, and instead, a new dark wizard rises to power in Hogwarts, creating a different kind of threat for Harry and his friends. A third concept could be an AU where the Hogwarts houses are mixed up for the fourth - year students, forcing them to work with those they usually wouldn't and leading to unexpected friendships and rivalries.
One interesting concept could be female characters taking on traditionally male roles. For example, a female Jedi Knight leading a mission that in the original canon was led by a male. It gives a fresh perspective on the Star Wars universe.
Another concept could be about Ben's relationships with his family and friends in new and exciting scenarios. Maybe a story where he has to team up with Gwen and Grandpa Max to solve a mystery on an alien planet, focusing on their teamwork and the bond between them.
In some Ben 10000 crossover fanfiction, there might be the idea of him interacting with characters from other popular alien - themed shows. For example, collaborating with the Green Lantern Corps from DC. This could lead to epic battles and unique power combinations. Ben 10000's vast array of alien forms could be pitted against the power rings in really interesting ways.
One interesting concept could be the combination of Ben 10 000's powers with other fictional universes. For example, if he were to cross over with the DC universe, seeing how his alien forms interact with super - heroes like Superman or Batman. Maybe his Four Arms form could have an epic battle with Doomsday.
One interesting concept is the crossover with other popular superhero universes. For example, a crossover with the Justice League could lead to some epic battles and team - ups. Ben could use his alien forms to fight alongside Superman or Batman. Another concept could be a crossover with a fantasy world, like Middle - earth. Ben's aliens might have to adapt to a completely different environment filled with magic and mythical creatures.