I was really surprised when they picked jinx and vi or just zaun in general to be the starting point to the league cinematic universe. I thought the likely pick would be ryze, since as far as I'm aware he's the one most closest to 'the main character' lore wise. But I've been very pleasantly surprised this far so, seems they made the right decision.
For non league players or lore readers, in the main lore vi and jinx aren't really that central to the league universe lore, so for many for them to be the ones to get their own show was surprising.
There's whole as cataclysmic demons in this world. Massive wars and conquerors and ancient wizards defending space and time itself but vi and jinx got their own show who play a much more minor role in the grand scheme of things.