The Fleshing
I linked Alistars lore because I really think Riot is missing an opportunity for a really cool and interesting game mode, and it's right here in his lore.
When Alistar was taken by the Noxians he was placed in what is known as the Fleshing, which through context is very likely a Noxian gladiatorial fighting pit. Something I think Riot's lore teams and game design teams should really consider is using the Fleshing from Alistars lore to make a really cool featured game mode where summoners fight in this pit, maybe 1v1, 2v2, or 3v3 or something. I haven't really worked out any details, especially since Riot tends to only use basic concepts when they use something posted in the forums. However I really think this could be an awesome game mode that people would have a lot of fun with, and it would be a really good usage of already established lore, which is something I think Riot needs to do more of.
I'd love to hear thoughts from you all and maybe even a little something from Riot. If I'm that lucky of course.
