Riot Games just announced the champion rotation lineup that will be implemented once the store opens in League of Legends. The team plans to have a rotating set of 10 free champions available to players at all times. Each week will have a different amount of types available; for example, the first week will have two tanks, three melee DPS, one ranged DPS, and so on.

The first week will begin once the store is open. Riot Games hasn't announced the launch date of the store yet, but plans to reveal it "soon." You can check out the champion rotation schedule and a short Q&A in this post on the official League of Legends forums.