The watchers have returned; April fools 2015?

So I was thinking about it, and perhaps this comes from a freshly awakened mind, but...

What if for April fools, We had a game mode that really messed with people? Like, what if you made it so that playing on the howling abyss on ARAM was just like normal, but then after one team beat the other teams nexus, it exploded but nothing happened? Both teams would be confused while sitting there, and like, the losing team didn't respawn but the winning team did, so the winning team goes exploring and then BAM right in the middle of the map is a giant creature (A watcher) and you either beat it or lose to it, and if you beat it you get an icon.

There could be a few optional side factors to this as well. Like, beat one watcher and then you unlock the next difficulty and then so on like the doom bots and you could have like 3-5 different watchers to beat.

It could also be a raid style game play where it is just 10 players beating a watcher, or you load into ARAM and get your champion at random and then the watcher is there instead of there being another team (So 5v1), or however you wanna do it. This could also be both, where you fight one and other (5v5) and the whole point of it is to level your champion up as high as possible before a timer ran out or something and then both teams fought together while (I don't know lore all that well) the frozen ice dude on blue side came alive and helped, or maybe he gives everyone a special type of smite that has to be used in a certain way to be able to kill the watcher before he destroys the bridge.

Thoughts?