Michonne and Rick aren't together in the comics. The focus of their characters and the overall plot doesn't bring them together romantically. However, their individual arcs are still significant and contribute to the depth of the story.
One great fanfiction could be 'Surviving Together'. It shows Rick and Michonne in a post - apocalyptic scenario where they rely on each other more than ever. Their relationship development is beautifully written, from hesitant allies to deeply in love partners.
The significance could be that it changes the entire flow of the story. Their relationship was a major part of the original narrative, and an early meeting would rewrite a lot of the plot. It might mean that they are able to save more people or face challenges in a different way.
In a 'Rick Meets Michonne Early' fanfiction, the story might focus on how their initial encounter changes their individual character arcs. For example, Michonne could influence Rick's view of the post - apocalyptic world in a new way. She might introduce him to different survival techniques or ways of thinking that he hadn't considered before. On the other hand, Rick could offer Michonne a sense of community and purpose that she was lacking. This could create a more intense bond between them from the start compared to the original storyline.