Single-Player/Co-Op Story Mode

I've never actually considered this personally but am sure that many others already have, but having just actually looked into the Doom Bot update, it made me think about an actual story mode, where you're following a more linear path or exploring a map to complete an objective or take out a 'boss'.. Each campaign could flesh out parts of the lore or to create entirely new plot 'arcs'.. Each campaign could be purchased for 400-1600 RP depending on actual length, basically the same price range as skins, or maybe bought with a substantial amount of IP (like maybe 25k, to give those people who have a ridiculous pile-up of IP but nothing worthwhile to spend it on)

And completing each campaign could grant you a unique skin or icon or other cosmetic reward that carries the same theme as the story it's from. Perhaps they all could have three levels of difficulty where the last difficulty is made to be genuinely challenging, but grants a slightly higher quality reward.

Some campaigns would only be done alone and with specific champions, while others could be done with anywhere from one to three extra players, the latter being more viable for less champion-specific stories, or totally new lore stringing otherwise relatively/completely unrelated champions together.

Figured I'd let my voice be heard, along with anyone else who'd like to see something like this. Surely if Riot sees consistent long-term interest expressed, it may happen somewhere down the line?