If Jack is a Star Killer, perhaps he has a vendetta against a certain group in the Transformers world. Maybe he blames them for something that happened to his family or friends. His actions as a Star Killer could start a chain reaction of events, leading to a full - scale war. The Autobots would have to figure out a way to stop the war and also get to the bottom of what's driving Jack to such extreme actions. They might try to reason with him or use force if necessary.
Well, if we consider a fanfiction with Transformers Prime, Jack and Star Wars, it's possible that Jack somehow ends up on a planet in the Star Wars galaxy. There, he meets some droids that are strangely similar to the ones in Transformers Prime in terms of their functions. He then tries to find a way back home while also getting involved in the local politics and power struggles, much like the heroes in Star Wars do.
One possible storyline could be Arcee teaching Jack some combat skills that are unique to the Transformers. Since she has a lot of battle experience, she could pass on her knowledge to Jack, who is eager to learn more about the world of the Transformers and how to better protect his friends. For example, she might teach him how to spot weaknesses in a Decepticon's armor.
One possible storyline could be that Bumblebee was exposed to a strange energy source that caused an unexpected biological change, leading to pregnancy. He then has to deal with the reactions of his fellow Autobots, some of whom are confused and others who are supportive. Another storyline could be that an enemy has somehow engineered Bumblebee's pregnancy as part of a devious plan to either weaken the Autobots or create a new type of weapon using the new life form.
Jack could be a time - traveling entity from another dimension. Not being human would mean he has different rules and abilities. He might be able to see the future or past of the Transformers' war and use that knowledge to either help or hinder the Autobots. This would add a complex layer to the story as the characters would have to figure out his true motives.
A more complex plotline could be a story of redemption for Airachnid. Jack, with his kind heart, sees something in her that makes him believe she can change. He tries to convince her to abandon her evil ways. This would involve a lot of character development for Airachnid as she struggles with her nature and the possibility of a new path, with Jack as her guide.
Yes, he could be in certain fanfictions. Fanfiction allows for a lot of creative freedom. Maybe the writer wants to show Jack's journey from being a Unicron fan to realizing the true nature of this evil entity. It can be a great way to explore character development. Or perhaps it's part of a more complex plot where Unicron has some sort of allure that Jack initially falls for, but then has to make a choice between his newfound interest and his loyalty to his Autobot friends.
One idea could be to write about how the other Autobots react to Jack being hurt. For example, Arcee might become extremely protective and vow to find whoever or whatever caused the harm. She could go on a solo mission to seek revenge while the other Autobots try to keep Jack stable and safe at their base.
There could be an exciting fanfiction where Jack meets Diobot. Maybe it would start with Jack exploring an unknown area and stumbling upon Diobot. Their encounter could be filled with suspicion at first, as Jack is cautious about new Cybertronians. But as they start to communicate, they might find common goals, like protecting the Earth from other threats.
In fanfiction, the possibilities are endless. Regarding Jack from Transformers Prime being a Batman fan, it could be a really cool concept. Imagine Jack looking up to Batman as a symbol of justice and using some of Batman's strategies in his own encounters. He might be inspired by Batman's use of gadgets and apply that thinking to his interactions with the Autobots. For example, when they're facing a difficult situation, Jack could draw on Batman - like tactics to help come up with a plan. But again, this all hinges on the creativity of the fanfiction writer.
One idea could be that the Autobots immediately launch a rescue mission. They use their advanced tracking systems to find Jack. Maybe Ratchet has some new tech that can detect Jack's unique human energy signature. They face many challenges on the way, like Decepticon traps.