One interesting aspect could be the exploration of different relationships. For example, how the characters of Scott Pilgrim and Lisa Miller interact in ways not shown in the original. It might also delve into new storylines, like a shared adventure or a mystery they solve together. Maybe it even reimagines their personalities a bit, making them more complex or different from what we know.
Sorry, I don't have a particular recommendation. However, you could try joining Scott Pilgrim fan groups on social media platforms. Fans there might be able to point you to some really good fan fictions that feature Lisa Miller. They often share their favorite reads and might even have some that are not as well - known but are really great.
Scott Pilgrim was indeed a comic first. It had a dedicated fan base from the comic world before branching out into other entertainment areas. The comic's success paved the way for its expansion into various mediums.