Influence event and Lore
I know the League was retconned and it won't come back, and this idea doesn't completely fit in Story (but it kinda does?).
I was reading on other websites and from what is concluded, the lore is becoming more separate from the game itself. We happen to play a game who use the characters from a separate universe, but we summoners have no shape in that story anymore. I thought of an idea that could bring some interaction back.
I believe this was kind of done for the Freljord event where the 3 factions fought against each other, and people picked sides. I'm thinking this but on a more big scale: at some point the lore meshes together and you have Demacia, Noxus, Targon, Shurima, Ionia, Shadow Isles, the Void, and the Freljord, and any other places all interconnected. What the Void does actually has relevance to say, the Demacia-Noxus fight. At the individual champion level, they aren't closed off to their own bubbles. Right now Shurima and their champions are in their own bubble, not involved in anything else. Demacia and Noxus kind of closed off but interferes with Ionia, and Targon/Void/Shadow Isles is to be expanded. Gnar might be a key in connecting Freljord to other places, but who knows.
When they do and more meaningful lore is established between the champions, then Riot hosts an event. It could be once a game season, or maybe twice. Each champion gains points, or influence, by their usage in the League. Their ip costs and their purchases will add to their influence (cheaper champions bought more may compete with expensive, rarer champions). Victories in matches will also add points (this will matter more). The "lore" progresses in stages. On the earliest stages, it may be something like small rivalries between Kass-Malz, or the personal goals of x champion. Depending on differences or milestones in influence, it decides who wins or if they stalemate. As stages and time progresses, the outcome for each of the champions builds up and interconnects. The later results might be a big melee or a competition between the large regions (for example, Shadow Isles + Void versus Demacia + Shurima). The victor regions or individual champions get, well, something nice. I don't know, it might be good or bad to reward those who play and represent a champion.
This idea seems like a neat way to combine the lore and the game, but it hinges on getting ALL of the lore out already. And then the result of the competition is basically non-canon, because the lore is stuck to be static and never resolved (Freljord).
I got this idea because I really wish the lore will actually work towards something BIG and not generic/closed off like with Shurima. It'll take time I guess.