Well, a great storyline might involve Starfire getting caught in a time - related plot with the Young Justice crew. Maybe she gets sent back in time and has to rely on their knowledge of the past to get back to her own time. Also, there could be a story where she and Artemis become really good friends and train together, sharing their combat skills and experiences from their different worlds.
One interesting storyline could be Starfire's unique powers interacting with the Young Justice team's abilities. For example, her starbolts might combine with Superboy's strength in a new way during a battle. Another could be her learning about Earth's culture from the Young Justice members, leading to some comical misunderstandings.
A really engaging storyline could be Starfire's presence causing a rift in the Young Justice team at first. Some members might be suspicious of her motives. But as time goes on, they realize she is truly an ally. There could also be a story where she helps the team deal with an alien threat that is specifically targeting her. This would force her to rely on the Young Justice team and also show how she can contribute to the group's dynamic with her alien knowledge and powers.
One interesting storyline could be Raven's struggle to fit in with the Young Justice team. Since she has such a dark and mysterious past, she might initially be an outcast. For example, the team could be hesitant to trust her powers which are often associated with the occult. Another storyline could involve Raven and a Young Justice member, like Robin, forming an unlikely friendship. They could bond over their leadership roles and the heavy burdens they carry. Also, a story where Raven's powers interact in unexpected ways with the technology - based powers of some Young Justice members would be cool. Maybe her magic disrupts some of their high - tech gadgets, leading to comical or tense situations.
One possibility in a 'Young Justice meets Starfire' fanfiction is that Starfire gets involved in one of Young Justice's internal conflicts. For instance, if there are differences in opinion within the team about how to handle a certain situation, Starfire could bring a fresh perspective. Her unique upbringing on Tamaran and her experience with different cultures in space might help the team resolve their issues. Also, there could be a lot of character - development moments. The Young Justice characters could grow by learning from Starfire's positive attitude and her ability to see the good in people, even in the face of great evil.
A cool plotline might be Starfire's origin story in the context of Young Justice fanfiction. How she ended up on Earth and her journey before joining the team. It could involve her past relationships on her home planet and how they influence her actions on Earth. Also, a plot where she discovers a new power within herself while training with the Young Justice group, which then becomes crucial in a big battle against a supervillain.
The interaction between Starfire and Beast Boy would be fascinating. Beast Boy can transform into different animals, and Starfire has her own set of superpowers. They could have some really fun and comical moments together, like when Beast Boy turns into a small animal and Starfire is trying to figure out how to communicate with him. Also, they could team up in battles in really creative ways, with Beast Boy using his animal forms to distract enemies while Starfire blasts them with her energy.
One interesting aspect could be the cultural clashes. Starfire, with her Tamaranian culture, might introduce new values and ways of thinking to the Young Justice team. For example, her views on friendship and loyalty could be different from what the Earth - based heroes are used to. This could lead to some great character - development moments as the team learns from her and she learns from them.
A third interesting storyline might involve a secret alliance between a member of the Justice League and a villain that the Young Justice team discovers. This discovery then sets off a chain of events where the Young Justice team has to decide whether to trust the rest of the Justice League and how to handle this new information without causing a complete breakdown in the superhero community.
Maybe there's a situation where a powerful artifact is discovered that has a connection to both Nightwing's family and Starfire's alien heritage. They embark on a quest to understand the artifact's true nature. During this journey, their relationship grows stronger as they face various obstacles and puzzles.
A plot could revolve around a misunderstanding between Nightwing and Starfire. For example, Starfire might misinterpret one of Nightwing's actions as him not trusting her. This could lead to some tension between them at first, but then they would have to work through it and in the process, their relationship could grow stronger. They could have deep conversations about their feelings and past experiences that bring them closer together.
One interesting storyline could be the Justice League having to deal with a mind - controlled Batman. Maybe some villain manages to take over Batman's mind, and the League has to figure out how to stop him without harming their friend. It would be full of action as they try to outwit Batman's strategic plans while also trying to break the mind control.
One interesting storyline could be a young hero who discovers their powers while being part of the circus in the Young Justice universe. They might have to hide their abilities at first for fear of being different. Another could be a mystery involving the circus performers where they seem to be disappearing one by one, and the Young Justice team has to figure out what's going on. A third storyline could be about a circus act that is actually a front for a secret training ground for new superheroes.