Attack from the Void (Co-op vs. AI... Not what you're thinking)
It might have been suggested already, but how about we have a game mode where we defend from the AI? And what would be more perfect than the void launching an assault on Runeterra for this? Your objective is to defend the core, in which minions that come from various lanes will attack. Occasionally, there would be champions coming out, which can allow duelists/assassins like Leblanc or to be a little more useful rather than have only waveclear champions. These minions and champions will attack anything that comes in their way, so getting in melee can get risky. Champions should be rebalanced or have their abilities work a little differently to suit the game mode better. I just wanna team up and have a challenge against an army of minions.

