How to create a LoL movie series or tv series.
So there are two options this could take and I'll describe them both below.
The first option is more of a King's Avatar approach where LoL remains just a game and the focus is on the esports side. This approach would work best as a tv drama as opposed to a movie. It would be a unique way to re-live the creation of the LoL esports scene and collaborate with some of the veterans of the different leagues.
The second option is a lore-based option that puts the story into the world itself. This could work as either an epic tv series or a longer movie series. A few things would be needed in order to pull this option off. The main thing would be a villain, sure there are many villainous characters in LoL but not one that could really pull the strings of every nation inciting conflicts all over the world. So in light of that, an unaffiliated villain would need to be created. The other would need to be an unaffiliated hero. Someone who can investigate the cause of all the conflicts and attempt to rally the nations together to deal with the true threat. Of course, not everyone would need to follow this hero character, Zaun, Noxus, and the Shadow Isles being three off the top of my head that could go to either side. In Noxus case, they could even choose to stand apart taking advantage of the new war to further their own goals.
In a movie format, each movie would center around a different region's conflicts before coming together for the clandestine battle. Hints to this villain could be filtered in slowly throughout the progression of the different movies.
In a tv format, it'd be structured a bit more like Game of Thrones where the show jumps from one conflict to the other. The final season being the big battle.
These are just thoughts I had while out for a walk,