Lex Luthor would be a great antagonist. He could see Superboy as a threat to his plans in Metropolis and try to find ways to discredit him or even eliminate him. Since Lois is a journalist, she might start to investigate Lex's actions against Superboy, which would put her in danger as well.
In some cases, the antagonist could be an alien race. Suppose an alien race wants to invade Earth and they see Superboy as the biggest obstacle. They might try to capture Lois as a way to lure Superboy into a trap. Superboy and Lois would then have to work together to outwit the aliens. The alien race could have unique powers and technologies that make them a formidable foe for Superboy and a real danger to Lois.
Another possible antagonist could be a new super - villain. Maybe someone who has the power to manipulate minds. This villain could target Lois to get to Superboy. He could make Lois write false stories about Superboy to turn the public against him. Superboy would then have to find a way to stop the villain and clear his name while also protecting Lois.
Lex Luthor could be a great antagonist. He could be jealous of their combined power and try to create a device that can split them up or weaken their powers. He might also try to turn the public against them by framing them for crimes they didn't commit.
Another theme is the relationship building. Since Lois has a pre - existing relationship with Superman, the fanfictions often explore how she forms a new connection with Superboy. It could be a friendship, a mentorship or even a romantic interest in some cases. For example, in some stories, Lois sees Superboy as a younger version of Superman she can guide, while in others, there's a spark of something more between them.
Maybe an alien race that doesn't approve of Superman marrying a human. They could send an agent to Earth to try and stop the marriage. This agent could have powers similar to Superman's and create a lot of trouble for the couple, both in their personal lives and in their superhero duties.
One great 'Lois meets Superboy' fanfiction is 'Superboy's New Ally' where Lois initially mistakes Superboy for Superman but then discovers his unique charm. It has some really exciting action scenes and a great build - up of their relationship.
Well, in a Superboy meets Lois fanfiction, they could meet during a big event in Metropolis. For example, there's a villain causing chaos in the city. Superboy steps in to stop the villain, and Lois is on the scene reporting. After the battle, Lois approaches Superboy for an interview. But Superboy is a bit shy and hesitant, not used to all the media attention. This interaction could be the start of a complex relationship, with Lois trying to break through Superboy's shell and get to know the real person behind the powers.
One possible villain could be Bizarro. Bizarro is always causing chaos and with Superboy and Superman together, it would be an interesting fight. Bizarro's reversed logic and powers would make it a tough battle for them.
The main characters in 'superboy meets krypto fanfiction' are Superboy and Krypto. Superboy, being a clone with Kryptonian powers, has a complex identity. Krypto, on the other hand, is a loyal and powerful super - dog from Krypton. Their encounter forms the basis of the story, and the story will likely revolve around their relationship, how they interact, and how they use their powers together to face various challenges in the fanfiction world.
Kingpin could be a great antagonist. He has a long history with Daredevil and his presence in Hell's Kitchen could draw Peter in. His criminal empire and power would pose a significant threat to both heroes.
A powerful Decepticon could be the main antagonist. Maybe a Decepticon named Shockwave who is on a mission to find Bumblebee and extract some important information from him. He sees Dante as an annoying obstacle in his way and tries to eliminate him. Shockwave's advanced weaponry and cold, calculating nature would pose a great threat to Dante and Bumblebee's friendship and their goals.
Maybe an old family acquaintance of the Blacks who has a vendetta against Andromeda for leaving the family and is now worried that Draco, as a young Slytherin from a prominent family, is being led astray by her. This character could use their knowledge of the Black family secrets and connections to create obstacles for Draco and Andromeda as they try to build a relationship.