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.
Another place is FanFiction.net. It's been around for a long time and has a lot of different fanfictions. However, the quality can vary, so you might need to look through a few to find the really good ones about Rick and Michonne. Some stories are rated by users, which can be helpful in finding popular and well - liked ones.
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.
It's complicated. While the main narrative might have reached a certain endpoint, there could be potential spin-offs or future mentions related to his story. So, in a way, it's not completely over.