Next game mode: RetroKill!
This is a suggestion and honestly I don't know which section it should really go on. It does kind of fall under the lines of Gameplay so there's that!
This game mode is completely retro. In this game mode, you can pick from seasons 1-4 and play on summoners rift in 5v5 settings. Each season will use the very last patch of its season. Also, in doing this, you'd be using the same summoner rift map from that season, same music, same original champion models and voices of that time as well as the old draft music in champ select. You'd also have the old default login screen to celebrate this event.
I realize this would probably be hard to pull off but I figure you must store the old patch files somewhere and maybe you could lump these together. We are celebrating 5 seasons of league of legends, let's get a little nostalgia going!
And if this isn't feasible, one can only dream
again.
with his Force of Nature.... shudder
Merry Christmas have some mana!
shut up
. I don't think some people are ready to have those PTSD flashbacks.
pro tip. do not look up beta version tf. it is scarier than teemo+leblanc.
and Ionic Spark on 
welcomes you to his lair