Faction-Based Gameplay Event
What if Riot facilitated a factions event?
Like summoners could declare their allegiance to a certain lore faction (Bilgewater, Demacia, Void, Bandle City, Zaun, etc...) (for the sake of team size not being 3v3 Targon will be left out) and then theyd get a special summoner icon. Then they could play in a special factions queue where its summoners rift but you only get to pick champions from your specific faction. You're matched with 4 other summoners from your faction and pitted against a team of 5 summoners from an enemy faction. Every match won earns points for the winning team's faction. At the end of the event, summoners who declared for and played a certain number of games for the winning faction get some sort of reward.
It could be a lore event too like some sort of powerful thingy was discovered and all the factions want to seize it for themselves.
Rito pls.
is from Noxus, but has pretty strong ties to Zaun.
was born and lived in Zaun, but is part of Piltover now.
and 
who get their powers from a "faction" but use them to fight against it. Or would places like the Void and the Shadow Isles not be included?