One idea could be Naruto being transported to the Young Justice universe during the Invasion arc. He could use his unique jutsu skills like the Rasengan to fight off the invaders. Maybe he teams up with the Young Justice team and teaches them some of his ninja techniques.
The idea of Superboy's powers evolving or him learning to control them better is also quite common. In many fanfictions, he has to face new challenges that force him to push the limits of his abilities. Also, there are often themes related to loyalty and betrayal. Given the nature of the Young Justice Invasion story, there can be situations where Superboy has to decide who to trust.
A great plot for Young Justice Invasion fanfiction might be to have the team deal with internal conflicts during the invasion. Maybe there are trust issues among some members because of secrets that come to light. For example, if a member was unknowingly related to one of the invaders. This would create drama and force the team to work through their issues while also fighting the external threat. Also, you could explore how the invasion affects the public perception of the young heroes. Are they seen as saviors or are people scared of them bringing more danger?
Artemis is a character that could be explored more in fanfiction. She has a complex backstory and during the Invasion, she could be given more depth. For example, her relationships with other team members could be further developed, especially how she deals with the stress and danger of the invasion while also maintaining her cover if she still has one at that point.
Another option is to follow some Young Justice fanfiction writers on social media platforms like Twitter or Tumblr. They might promote their own works or share other great fanfictions they've come across. Some of them focus specifically on Superboy in the context of Young Justice Invasion, and you can get direct access to their creations this way.
Well, it could be really interesting. They might be amused by some of the creative interpretations in the fanfiction. Some might find it strange to see their own characters in different scenarios that the fans have come up with.
Some members of Young Justice could be embarrassed. For instance, if there are romantic fanfictions about them that are a bit too cheesy or if their weaknesses are overly emphasized in a not - so - flattering way. But others might be really intrigued and want to explore more of what the fans think about them.
One great 'Young Justice Dimension: Justice League' fanfiction is 'The New Recruits'. It focuses on how new members are integrated into the team. The story has great character development and exciting action scenes.
Sometimes, canines in these fanfictions are given unique powers. They could be from another dimension where canines are the dominant species and have powers like flying or shooting energy beams from their eyes. This adds an interesting twist to the Young Justice universe.