It could be that an interdimensional rift has opened, and Harry and the Cybertronians are the only ones who can close it. Harry, with his leadership skills, guides the Cybertronians through different dimensions to gather the necessary components to seal the rift. During this journey, they form strong bonds and overcome many foes together.
The plot could involve Harry leading the Cybertronians in a battle against an evil force that threatens both their worlds. They might use their unique abilities - Harry with his magic (if he has some in this fanfic) and the Cybertronians with their advanced technology.
An ancient evil entity from Cybertron's past could be the antagonist. It awakens and wants to use the Cybertronians for its own dark purposes. Harry, leading the group, has to find a way to stop this entity before it's too late. This entity could have powers that are both technological and magical in nature, making it a formidable foe.
Maybe it's about Harry getting together with his friends like Hermione and Ron to form a study group. They could study various magic subjects, face challenges like difficult exams or mean professors trying to stop them from using non - traditional study methods, and in the end, they all improve their magic skills.
One possible plot could be that Harry discovers his unique ability to communicate and lead werewolves. He might use this to form an alliance between the werewolves and the wizarding world against a common enemy, like dark wizards who want to use werewolves for evil purposes.
One possible plot could be that Harry's insanity is caused by a cursed object. His friends then have to find a way to break the curse while also dealing with his erratic behavior. For example, Harry might accidentally reveal secrets to the wrong people because of his insanity.
The plot could involve Harry struggling to hide his true nature as a Nathrezim from his friends at Hogwarts. He might have new, dark powers that he has to learn to control, and he's afraid of how others will react if they find out. Meanwhile, Voldemort senses something different about Harry and is both intrigued and threatened by him.
One possibility could be that Harry has been alive for 500 years by using some powerful magic that had unforeseen consequences. He might have seen the rise and fall of many magical civilizations and now has a vast knowledge of magic that no one else does. He could be a sort of hermit, living in an isolated place and only emerging when there is a great threat to the wizarding world that only his ancient knowledge can solve.
In this fanfiction, Harry's Animagus skills as an Avenger might also lead to some interesting character interactions. He could teach the other Avengers about magic and how his Animagus form works. For instance, Tony Stark might be intrigued by the magic behind it and try to find a scientific explanation or a way to replicate it. Meanwhile, Steve Rogers could be more interested in how Harry uses this ability in combat situations.
Well, one possibility is that Harry, now reborn as an Uchiha, might discover his newfound Sharingan abilities early on. He could use his knowledge from his past life to quickly rise through the ranks in the Uchiha clan. Maybe he'd try to prevent the tragedies that befell the Uchiha in the original Naruto story, like the massacre. He could also use his magic - if it somehow transferred with him - in combination with his ninja skills to become a truly formidable force.
One possible plot could be that the contract is a magical binding that forces Harry to work with Voldemort in some way. Maybe it's a deal to save the lives of his friends. So, Harry has to reluctantly follow Voldemort's orders while secretly looking for a way to break the contract.
One possibility could be that Harry is in a difficult situation, perhaps a mystery in a new world that he's not familiar with. He calls Gibbs because he has heard of Gibbs' skills in solving problems and investigations. Gibbs then uses his no - nonsense approach to start looking into the matter, guiding Harry through the steps of finding clues and making sense of the chaos around him.