Batman could meet Starfire. She has unique powers and a different perspective from Batman. They might have a conversation about her powers and how she can use them more effectively. Also, Batman might be curious about her alien origin and what it means for the Titans' capabilities.
In this fanfic, Batman would most likely meet Beast Boy. Beast Boy's shape - shifting ability could catch Batman's attention. They could have an exchange about how Beast Boy can use his ability in more strategic ways during battles. And Batman might even share some tips on how to be more stealthy while in different forms.
Maybe he'll encounter a young genius student who becomes his sidekick for the time he's at school. This student could help him with his high - tech gadgets or offer unique insights into the school's problems. Also, he might run into the principal who is initially suspicious of him but later realizes his good intentions.
Well, he could be there to offer his expertise. Maybe he wants to train the Titans in new combat techniques. He might also be there to check on a potential threat that the Titans are facing and offer his help in dealing with it.
One idea could be a crossover where Batman Beyond teams up with the Teen Titans to face a new threat in Gotham. Maybe a powerful villain has emerged who is using advanced technology that only Batman Beyond can understand, and the Titans' unique powers are needed to combat the villain's minions.
In the fanfic, Batman might use his advanced gadgets to save the Teen Titans. For example, he could use his grappling hook to pull them out of a dangerous situation like a collapsing building. His Batmobile could also be used for a quick escape or to ram into villains threatening the Titans.
In some fanfics, the moment when the Teen Titans and Batman Beyond combine their powers to defeat a seemingly invincible villain is always a highlight. For instance, if the villain has the ability to absorb energy, the Titans use their powers in a coordinated way to distract the villain while Batman Beyond figures out a way to disrupt the villain's power - absorbing mechanism.
He might meet the leader of Amegakure. Naruto could also come across some skilled shinobi who are masters of rain - based jutsu.
There could be a hermit or an outcast Jedi or Sith on Dathomir. Anakin meeting this character could lead to a great revelation. Maybe this character has been in hiding on Dathomir for years, observing the balance of the Force there, and Anakin's arrival disrupts that balance and forces an interaction that changes Anakin's perspective on many things.
Perhaps he'll meet an old patient who has been in the hospital for a long time. This patient could tell Harry some long - forgotten stories about Hogwarts in the past. There could also be a chance that he meets some other students who are also in the hospital for various reasons, and they might form a new friendship or alliance.
Perhaps he'll meet some interesting magical creatures that are native to the holiday location. It could be a friendly forest sprite or a wise old centaur. He may also cross paths with some international wizards who are also vacationing there and learn about different magical cultures from them.
In the 'Naruto goes to the North' fanfic, he may come across a group of nomadic ninjas. These ninjas have a different way of life compared to the ones in Konoha. They might be more in tune with nature and have unique abilities related to the natural elements of the North. Naruto could learn a great deal from them and they could also be potential allies in his adventures in the North.