A huge congrats to the Weird Gloop team on this, and to the League of Legends community for what's certain to be a huge bump to the availability of high-quality information and community space.
As others have pointed out, the RuneScape Wiki (where Weird Gloop started out) is probably the highest quality gaming wiki on the internet. Not only is its information itself up-to-date and accurate, but it has countless custom features and interactive tools that elevate it from a crowdsourced knowledgebase to a sort of data and analytics hub for the game.
Anyway, this really is terrific news and any wiki that chooses to partner with Weird Gloop is certainly in the best of hands.