Where the hell is Poro King?

We had Nexus Siege last weekend. Personally I really dislike the gamemode and am kind of mad one of my favorites isn't where it's supposed to be. Is there a reason they released it again this weekend? Was it a mistake? Is there some post somewhere that they were going to release it again, if so I never saw it.

I didn't like the gamemode and this is supposed to a ROTATING mode system is it not? I want my poros, ascension, URF, all for one, SOMETHING that isn't Nexus Siege. That mode got old real fast when playing it.