Lex Luthor would be a great villain. He could see Power Girl as a new threat or an opportunity to manipulate Superman through her. His devious plans and high - tech gadgets would add a lot of drama to the story.
There are quite a few great writers. One is [writer's name], who really captures the essence of both Superman and Power Girl. Their stories often have a great balance between action and character development. Another good writer is [writer's name]. They are known for their unique take on the DC universe and how they incorporate Superman and Power Girl into different scenarios.
The Joker is always a classic choice. His chaotic and unpredictable nature would create a great contrast to Damian's more disciplined upbringing. It could also put a strain on the relationship between Batman and Damian as they deal with the Joker's madness in different ways.
Cheetah would be a great villain to include. Her connection to Wonder Woman's world and her fierce fighting skills would make for some exciting battles. Also, Bane could be interesting. His brute strength and strategic mind could pose a real challenge to Batman and Wonder Woman when they team up. Lex Luthor is another option. His intelligence and vast resources could create a complex and dangerous situation for the two heroes.
Darkseid can also be a common antagonist. His goal of universal domination means that he would see Superman and Power Girl as threats to his plans, and he would send his minions or come himself to fight them.
I think Mark Brown is also a well - known writer in Power Girl and Superman fanfiction. His writing style is very descriptive, making the readers feel like they are right there with the heroes. He often writes about their adventures in different timelines and alternate universes. There's also Emily White who is popular for her unique take on the characters. She gives Power Girl and Superman new personality traits that make their interactions even more interesting.
Cell would be a great villain to include. His ability to absorb other beings and his complex personality make for an interesting dynamic with Goku and Gohan. There could be a scenario where Cell somehow returns and is even more powerful, forcing Goku and Gohan to team up again in a new and intense battle.
Venom would be an interesting addition. Since Venom has a personal vendetta against Spiderman, he could see Spiderman's new married life as a weakness to exploit. His symbiotic nature could make him a very menacing foe. Also, Electro could be in it. His ability to control electricity could cause problems for the couple, like when they are trying to have a romantic dinner and Electro shuts down the power in the city, or he could target the power sources in their home as a way to get to Spiderman.
Lex Luthor is the most well - known villain. He's a brilliant but evil scientist who's always devising plans to defeat Superman. Another famous one is Doomsday. He was strong enough to kill Superman in a very intense battle.
Some fanfictions focus on the relationship between Superman and Power Girl outside of their superhero duties. For example, they could be attending a family gathering where they have to deal with all the normal family drama, but with the added complication of being super - powered. There are also stories where they train together, sharing their different combat techniques and learning from each other. This not only helps them become better heroes but also deepens their bond as family members in the DC lore.
One interesting plot could be a team - up between Power Girl and Superman against a powerful new villain from another dimension. They have to combine their super - strength and other abilities to stop this threat that is causing chaos across multiple universes.