In 'Transformers DC Crossover Fanfic', a common idea is a technology - magic mashup. Since Transformers are all about advanced technology and DC has a lot of magic - based characters like Zatanna. The story could be about how they combine their powers to defeat a new type of enemy that is immune to normal attacks. Also, a rescue mission where the Autobots and DC heroes team up to save hostages in a dangerous location is quite popular. And then there's the idea of a shared enemy that is a hybrid of a Decepticon and a DC villain, like a fusion of Shockwave and Brainiac who plans to conquer both universes.
One popular idea is the combination of different generations of Autobots and Decepticons. For example, bringing together the classic G1 Transformers with the more modern ones like those from Transformers Prime. Another idea is a crossover with different universes where the rules of transformation or the source of their power is different. For instance, a crossover between the regular Transformers and the ones from the Beast Wars universe. Also, a story where the Transformers cross over into a human - dominated world in a different way than usual, like they become part of a virtual reality game world that humans created.
One interesting idea could be a crossover between Transformers and the Harry Potter universe. Imagine Optimus Prime leading the Autobots through Hogwarts, facing magical threats alongside the wizards. Another could be a Transformers and Star Wars crossover, with the Autobots and Decepticons getting involved in the Galactic Civil War. Maybe the Transformers' advanced technology could have an impact on the balance of power in the Star Wars galaxy.
One idea could be a crossover between Batman and Superman. Imagine a story where they have to team up against a new super - villain who has the power to manipulate time. Another could be a crossover with the Flash and Green Lantern, perhaps they get stuck in an alternate dimension and have to work together to find their way back.
First, you need to know the characters well from both universes. For Transformers, understand their personalities, like Optimus Prime's leadership and Bumblebee's loyalty. In DC, know the heroes' and villains' traits, such as Superman's strength and Lex Luthor's cunning. Then, come up with an interesting plot. It could be about a common threat that forces the Transformers and DC characters to team up. Maybe a new villain who can manipulate technology and magic is causing chaos in both worlds. Also, make sure to write good dialogue that fits each character.
One idea could be having the Autobots and Decepticons end up in the Bayverse's version of Chicago during a major crisis. They could team up with the local military forces there to fight a common enemy, like an alien invasion that is different from their own Cybertronian battles. Another idea is to have a human character from the Bayverse accidentally stumble upon a hidden Cybertronian relic that has the power to transform Earth's technology in unexpected ways, leading to a race between the Transformers and various human factions to control it.
One idea could be that the dragon's fire power can be used to recharge the Transformers in some way. Another is that the Autobots could learn the concept of flying from the dragons and incorporate it into their own designs. Or perhaps the Decepticons try to capture the dragons to use their power for evil purposes, and the vikings and Autobots have to work together to stop them.
One idea could be a crossover with the Autobots from Transformers Prime and the Titans from Attack on Titan. Imagine the Autobots having to fight the Titans in a post - apocalyptic world. Another idea is a crossover with the Power Rangers. The Rangers and the Autobots could team up to fight a common enemy that threatens both their worlds. A third idea might be a crossover with the Teenage Mutant Ninja Turtles. The Turtles could use their ninja skills along with the Autobots' firepower to take on a new threat in New York City.
One popular idea is the crossover between Batman and Superman. Fans often write about their team - up against a common, extremely powerful villain like Darkseid. It allows for exploring their different approaches to heroism and how they interact.
One idea could be a story where the Avengers and the Justice League team up to fight a common enemy like Darkseid and Thanos working together. Another could be a character - swap scenario, for example, Superman being in the Marvel universe and having to deal with the likes of Doctor Doom. Maybe a story where Batman uses his detective skills to solve a mystery in the Marvel world that involves Hydra.
Some might like the idea of an OC being a villain in the DC fanfic. They could have a vendetta against one of the main heroes, like Batman, because they believe he has wronged them in some way. This OC villain could use their intelligence and a set of high - tech gadgets to cause chaos in Gotham. Another popular oc and dc fanfic idea is an OC who is a magic user and gets involved with the likes of Zatanna and Constantine in the magical side of the DC universe. They could be on a quest to find a powerful magical artifact that could change the balance of power in the magical realm.