A more heart - warming plotline could be Ben and his 'babies' going on a journey of self - discovery together. They explore different planets and cultures, and along the way, the 'babies' learn important values like friendship, courage, and responsibility from Ben.
Another plotline might involve Ben protecting his 'babies' from an enemy that specifically targets them because of their relation to Ben or their potential power. He'd have to use his experience and the various alien forms at his disposal to keep them safe.
Obviously, Ben Tennyson is one of the main characters. He is the central figure around whom the story revolves. And the 'babies' are also main characters, though who they are exactly can vary. They could be new alien forms that Ben discovers and takes under his wing, or they could be some sort of younger versions of himself or other characters related to the Ben 10 universe.
In some fanfictions, baby Ben might be in a situation where he's being protected by his future self's allies. For example, Gwen and Kevin could be babysitting baby Ben, and they have to deal with all the chaos that his unpredictable Omnitrix activations bring. It's a fun concept as it shows a different dynamic between the characters.
Well, in some of these fanfictions, they might go on adventures together. For example, they could combine their unique powers to fight against a common enemy that neither could defeat alone. Their different personalities, Ben's more laid - back and Juniper's strong - willed, can create interesting dynamics in the story.
One possible plotline could be that Ben is tied up by villains as part of a trap, but he uses his wits and the power of his Omnitrix (even if he can't physically use it at the moment) to outsmart them. For example, he could trick them into untying him or find a way to break free on his own later.
One popular 'Ben Tennyson x OC fanfiction' could be the ones where the OC has unique powers and teams up with Ben to fight villains. For example, a story where the OC has telepathic abilities and helps Ben anticipate the enemies' moves. Another might be a romantic 'Ben Tennyson x OC' fanfic where the OC is from a different dimension and they fall in love while exploring new worlds together.
Some fanfictions explore the pregnancy from a more comical angle. Like, Leslie's pregnancy hormones make her act in really unexpected ways, and Ben has to deal with it while also handling his own work at the city hall. There are also stories where they compete with other couples in Pawnee to have the best - prepared for baby, which leads to some really funny and competitive situations.
One possible plotline could be the growth and development of the baby dragons. Maybe they inherit unique abilities from Toothless and have to learn how to control them. For example, if Toothless has a special fire - breathing ability, the babies might start to show signs of an even more powerful version of it and they need to be trained to use it properly.
One popular 'ben tennyson feminization fanfic' could be 'Ben Tennyson: A New Feminine Perspective'. It explores how Ben's character might be different if he were female, with interesting takes on his powers and relationships. Another might be 'Feminized Ben Tennyson: The Adventure Continues' which delves into how the female version of Ben would handle the various challenges in the story universe.
It's really hard to say. Ben at his strongest has access to some incredibly powerful alien forms. But Goku at his strongest can literally destroy universes. However, if Ben could transform into an alien with reality - warping powers, he might have a chance. But Goku's speed and combat experience are also very high. So it could go either way depending on the situation.
In this fanfiction, it could be that the Necrofriggian babies are the result of some sort of experiment gone wrong. Ben stumbles upon them and realizes that he is the only one who can help. He has to figure out how to reverse the effects of the experiment while also dealing with the fact that the babies are in a very fragile state. He might enlist the help of his friends, but also face challenges from those who don't want the experiment to be reversed.