One possibility is that the story focuses on how Raven and Beast Boy adjust to being parents. They might face difficulties like protecting their baby from villains who want to use the baby's powers for evil. The baby could also be a key to uniting different factions in their world, so there would be a lot of political intrigue around it as well.
Well, obviously, baby Beast Boy is a main character. The other Titans like Robin, Starfire, Cyborg, and Raven often appear as well. They play important roles in taking care of baby Beast Boy or helping him with his powers.
One interesting plot could be baby Beast Boy's first encounter with other Titans as a baby. Maybe he accidentally turns into different animals and causes chaos in the Titans' tower in a really cute way.
There could be fanfictions where Beast Boy is babysitting or being babysat. For example, a story where he has to take care of a younger teammate's pet or a small child in a comical situation. He might use his shape - shifting abilities to entertain the little one.
It could be Trigon. Since Raven has a connection to him, he might see the baby as a way to get revenge on Raven or as a powerful tool for his evil plans. He could try to corrupt the baby's powers for his own use.
A 'baby beast boy fanfic' might focus on his relationship with the other Titans when he's in a baby form. He could be super cute and the others have to take care of him, like Raven trying to use her magic to keep him entertained or Cyborg building little toys for him.
There are some fanfictions that might depict Beast Boy as a vampire beast in a post - apocalyptic world. He could be using his shape - shifting abilities in unique ways, like turning into nocturnal animals more easily since he has vampire traits. This type of fanfiction often delves into the darker side of his character and how he survives in a harsher world.
Well, Cyborg could also be a main character. He and Beast Boy are good friends, and Cyborg might have to adjust to his friend's new appearance and the changes that come with it. And then there's Robin. As the leader, he would need to deal with how Beast Boy's transformation affects the team dynamics. Maybe he has to figure out new strategies that take into account Beast Boy's new situation.
One possible fanfiction could involve Beast Boy and Storm meeting in a multiverse scenario. Maybe Beast Boy is on a mission in Storm's world and they initially clash due to their different powers and personalities. But as the story progresses, they start to understand and respect each other's abilities and end up working together to defeat a common enemy.