Riot Games has kicked off Season 4 of League of Legends, which will eventually lead to the massively large League Finals match. If you're interested, you can watch upcoming matches like the North American LCS Spring Split and the European LCS Spring Split here on Riot's official esports hub.
In addition to that announcement, Riot has dropped a new 4.1 patch, which contains changes for a number of Champs, as well as a lot of changes in the league system, and free rotations of characters for early level new players. If you're interested in checking out some of the latest Champions added to the game, follow the links at the bottom of this post.
Patch 4.1 Notes [League of Legends]