One great example could be a fanfiction where Lee teams up with new survivors. He uses his leadership skills, which he developed before, to guide them through tough situations. They might encounter a new group of hostile survivors, and Lee's experience helps them avoid a full - on war.
Rick would probably be one of the first to interact with Lee. They are both leaders in their own right, so there could be some power dynamics at play. Clementine would also be a key character to interact with him, given their past relationship.