Well, Nightwing's combat skills and detective abilities could be crucial in different time periods. Flash, with his super - speed, could be used for quick escapes or getting to important events in time. They could travel back to solve a mystery related to their families' pasts, like if there was some hidden connection between the Wayne family and Flash's origin that was lost in time.
One great time - travel fanfiction involving Nightwing and Flash is 'The Time - Twisted Team - Up'. It has an exciting plot where they travel back to prevent a major disaster in Gotham's past. The way the author weaves their powers together during the time - travel adventure is really engaging.
It could work through a time - turner like device. Maybe an ancient and more powerful version of the one Hermione used. This device might have been created by a powerful wizard in the past and Harry stumbles upon it in Hogwarts. It allows him to set the time and date he wants to travel to, which in this case is 1970.
First, understand the Flash's time travel mechanics in the original source. Then, come up with a unique time period or event to send the Flash to. For example, you could send him back to the Wild West. Next, think about how his actions in that time will affect the present or future. Keep the story focused on the Flash's character growth through his time - traveling experiences.
The Flash's time travel to the future in fanfiction is really interesting. Firstly, his ability to move through time can expose him to future technologies and civilizations. He could bring back knowledge of these things to the present. Secondly, his actions in the future might be misinterpreted by the people there. They could see him as a threat and try to stop him. This would create a conflict that he has to resolve while also dealing with the implications of his time travel on the future.
Well, it could start with Phoenix getting into a normal carpool, say with some of his colleagues or friends. Then, something strange happens, like a lightning strike or a magic spell, and suddenly the car becomes a time - traveling vehicle. They then travel to different eras, and Phoenix uses his legal knowledge to navigate the strange situations they encounter.
Some Flash time travel fanfics play with the idea of time travel via dreams. Barry Allen could enter a dream - like state where he experiences different timelines. It's an interesting take as it blurs the line between reality and the subconscious.
Another way time travel works in these fanfictions is through dreams or visions that turn out to be more than just that. A character might have a really vivid dream about the past or future in Riverdale, and then suddenly find themselves actually in that time period. This method allows for a more psychological exploration of the character as they deal with the shock of suddenly being in a different time and having to figure out what's real and what's not.
In some RWBY time travel fanfiction, it might work through the use of a special relic. The relic could have powers that are not fully explored in the original series but in fanfiction are used for time - traveling. For example, it could be activated by a specific combination of Dust or a certain type of Grimm blood.
In some Bridgerton time travel fanfictions, it could be a magical object that enables the time travel. For example, a mysterious locket that transports the wearer to different eras within the Bridgerton world.
In many Narnia time travel fanfictions, it often involves magical objects. For example, a enchanted hourglass might be the key to traveling through time. The sand in the hourglass could have the power to send the character to a specific time in Narnia's past or future.