One way could be through some sort of experimental device left behind by the military. Maybe a scientist in the group discovers it and accidentally activates it, sending one or more characters back in time. They could then try to change things that led to the zombie apocalypse in the first place.
It could also be due to a scientific experiment gone wrong. A group of survivors might be trying to find a cure in a makeshift lab and accidentally create a time - traveling device. This device could send them to various points in time within the story's timeline. They might use this to go back and save important characters who died early on, which would completely change the course of events in the fanfiction.
Well, one possibility is that Lee could use his knowledge of the future to prevent some of the tragedies in The Walking Dead world. For example, he might be able to stop certain characters from dying prematurely. He could also try to find a cure for the zombie virus much earlier if he travels back far enough. Maybe he'd team up with different groups in different time periods and change the power dynamics within the story.
Survival is also a major theme. Even with time travel, characters still have to figure out how to survive in a world overrun by walkers. They use their knowledge from the future to gain an edge, like knowing where to find safe havens or weapons. Another theme is changing the future. By going back in time, they hope to alter the course of events for the better, whether it's preventing a certain group from turning bad or stopping a major disaster from happening.
One way to incorporate male lactation into Walking Dead fanfiction could be through some sort of experimental virus or mutation. Maybe the same virus that turns people into zombies has some unexpected side effects on male physiology, causing lactation. However, this would be a very strange and out - there concept that would need to be carefully developed to fit within the overall tone of the story.
Lee's character could become more complex. He might start to question his own actions and decisions in the past if he travels to different points in time. His moral compass could be further tested as he sees the consequences of different choices. For example, if he witnesses the result of a decision he made that led to many deaths, he may try to rectify it in another timeline.
Traveling to a future time where humanity has either found a way to co - exist with the walkers or has completely eradicated them would be cool. In this time period, the world might have been rebuilt in a very different way. There could be new technologies developed specifically for dealing with the undead threat, or perhaps a new form of society has emerged that is based on different values due to the apocalyptic experience.
One popular 'Walking Dead Time Travel Fanfiction' is 'Back to the Beginning'. It takes the main character back to the start of the apocalypse and they try to change things. Another is 'Time - Twisted Survival' which has an interesting take on how time travel affects the group's dynamics.
Rick would be an interesting choice. He has so much leadership experience. If he were sent back in time, he could use his knowledge of survival and leadership to better prepare society for the impending apocalypse. He could start stockpiling weapons, food, and building secure shelters.
She could develop a greater sense of purpose. Maybe by seeing the consequences of certain events in different timelines, she realizes that there is a specific task she needs to accomplish in her own timeline to ensure the best future for her friends. So she becomes more focused and determined than ever before.
The time gap in The Walking Dead comic varies throughout the series. Sometimes it's a few weeks or months, but at other points, it can be a year or more.