Another possibility is that it focuses on the technological future of the Arcane universe. The story could be about how new inventions in Piltover are going to change the relationship between the two cities. There could be a scientist character who watches the future of technology and tries to either encourage or prevent certain advancements based on what they see.
I recommend "The Path of the Bloodline to Devouring the Stars" to you. The protagonist of this novel also has an arcane bloodline, and can obtain their talent and cultivation aptitude by devouring other creatures. This was a doujinshi novel set in a world that devoured the stars. I hope you like this fairy's recommendation. Muah ~😗
One of the best 'Arcane' fanfics could be those that explore the backstories of the characters in more depth. For example, fanfics about Vi and Jinx's childhood before the events of the show can be really engaging. They might delve into their relationship with their parents or how they coped with the difficult situation in the undercity.
Maybe better communication. If they had talked more openly about their hopes, dreams, and fears, it could have turned into a real love story. They might have realized they were perfect for each other.
Yes, it could have. Fanfiction often takes existing universes and expands or reimagines them. Harry Potter has so many elements that could potentially be the work of a fan. For example, the magical world with its unique creatures, spells, and Hogwarts as a school. If J.K. Rowling wasn't the original creator but was building on someone else's initial ideas about a magical school and a boy wizard, it would be fanfiction. However, she is the original creator, but the conceptually it has elements that could be seen in a fan - created work.
An unfinished love story often leaves readers with a sense of longing. It could be that the author intended to show the unpredictability of love. Maybe the couple was on the verge of getting together when something sudden, like an illness or a job opportunity in a far -off place, disrupted their relationship.
Perhaps it was a lack of communication. Without proper communication, misunderstandings can easily occur and drive two people apart, even if it could have been a love story.