Another option is Brother Blood. He's always interested in power, and the baby of Raven and Beast Boy would be a very powerful being. He might try to kidnap the baby and use it to create an army of super - powered minions or something like that.
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.
Slade could also be a main villain. He's a strategic and dangerous foe. He might see the baby as a weakness of Raven and Beast Boy. He could plan to use the baby to manipulate them into doing his bidding, or he might try to eliminate the baby to break their spirits.
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.
The main villain could be a time - traveling version of one of his regular foes, like Slade. Maybe Slade from the future has developed a way to manipulate time and he's going back in time to stop Beast Boy from ever becoming a Titan or to change events in his past that will make him easier to defeat. Another option could be an ancient evil that was sealed away in the past and Beast Boy's time travel accidentally releases it. It then tries to take over the present by changing key events in history. And it could also be a future version of Beast Boy himself who has been corrupted by power and is trying to change the past to make himself even more powerful.
Well, Raven and Beast Boy are the main characters. Raven, with her dark and mysterious aura, brings a sense of depth to the story. Her powers are not only for fighting but also for protecting her new family with Beast Boy. Beast Boy, being able to change into animals, adds an element of fun and unpredictability. Their relationship forms the core of the fanfiction, and other characters from their universe may play supporting roles in their married life story.
A plot could involve an unexpected pregnancy. Beast Boy and Raven are in the middle of fighting some new villains when Raven discovers she's pregnant. This throws them off balance. They then have to figure out how to protect the baby while still being superheroes. They might have to hide Raven away for a while to keep her and the baby safe. Their relationship also deepens during this time as they face this new challenge together. Eventually, they have the baby, and it becomes a symbol of hope for the future in their world.
Slade could be a great main villain. His combat skills and strategic mind would pose a huge challenge for Beast Boy. Beast Boy would have to constantly outwit and outmaneuver Slade, which would really bring out his badass side as he tries to protect his friends and the city from Slade's evil plans.
The baby could be an ordinary human baby that has some sort of latent magical ability that Raven senses. She then decides to protect the baby from the human world that may not understand or accept the baby's potential magic, and also from the magical world that might want to exploit the baby.
Another reaction could be that he tries to hide his feelings by putting on a brave face. He might joke around even more to cover up the fact that he's really hurt. But deep down, his feelings are still damaged and this could lead to some bottled - up emotions that might explode later.
The significance could be the realization of a long - awaited romantic moment for fans who ship them. It's a moment that validates their feelings for each other in the fictional world of the fanfiction.
Slade could also be a possible antagonist. He's always been interested in causing trouble for the Titans. The baby would be a new target for him. He might try to kidnap the baby to manipulate Raven and Beast Boy into doing his bidding. Or he could try to use the baby to gain access to some powerful artifacts or secrets that are related to the Titans.
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.