For one, the icons include the names of the new ores and metals: Ghost Iron and Manticyte. There are also icons for new class spells such as the paladin's Holy Avenger and the rogue's updated poisons -- not to mention the icons for new gear, new achievements, and the pet types in the upcoming Pet Battle feature. The pet types appear to be critter, dragon, elemental, flying, humanoid, magical, mechanical, undead, and water.
It's open warfare between Alliance and Horde in Mists of Pandaria, World of Warcraft's next expansion. Jump into five new levels with new talents and class mechanics, try the new monk class, and create a pandaren character to ally with either Horde or Alliance. Look for expansion basics in our Mists FAQ, or dig into our spring press event coverage for more details!