Jeff Kaplan, Overwatch's game director, has outlined how the game's competitive play mode will work when it is released.
Speaking to Eurogamer, Kaplan confirmed competitive play will be coming this month, but there is no firm release date yet. In Competitive Mode, players will go up and down ranks based on whether you win or lose, similar to Hearthstone's current system. Plus, it'll be season based, so your rank will reset every few months.
Blizzard listened to feedback for its plans for the original ranked system, and found that player perception was off. The intitial system was progression based, with Heroic Rank being the highest ranking you could achieve. The game would show "a stack ranking of top players who hit that rank," said Kaplan.