Tomorrow, Blizzard will be releasing patch 6.2.2 for World of Warcraft. The big additions are Mercenary Mode and flying around Draenor. Mercenary Mode allows you to play as a Mercenary for the opposing faction. For example, if you play as an Alliance you will be playing as a member of the Horde and even wear a mask as one of the opposing races. This is mostly being done in order to shorten the queues for Ashran and unrated Battlegrounds.
In addition, there will be an achievement called Draenor Pathfinder. Earning this achievement will allow you to unlock a new mount named the Soaring Skyterror and will give you the ability to fly around Draenor.