World of Warcraft Mists of Pandaria
Blizzards trump card to get their millions of lost subscribers back to paying $15 a month is here. The fourth expansion to the famous World of Warcraft is here and yes there will be pandemonium. No release dates have been set but there are multiple preview videos that explain what changes will occur in the new expansion to the World of Warcraft.
Some of the new features for Mists of Pandaria include; New Pandaren race, New character class Monk, New quests on the continent of Pandaria, level cap raised to 90 
(seriously should be 100 by now), Dungeon Challenge mode, Pet battle system (PokeMon!), and new PvE Scenarios.
The new World of Warcraft Expansion has implemented a Dungeon Challenge mode that allows seasoned dungeon crawlers to choose an extra objective when clearing out an instance. It seems as of right now the Dungeon Challenges will all be time based and the faster your group clears the dungeon and all the bosses the more rewards your group will receive. I would personally like to see more customization to the Dungeon Challenge like 0 deaths throughout the instance, or perhaps pulling a Leroy Jenkins and aggroing an entire dungeon and surviving. There will also be a point system that shows how many medals you have obtained on Dungeon Challenges for bragging rights ;)
New Pandaren Monk class is basically Po from Kung Fu Panda that utilizes ancient Chinese weapons such as Fist Weapons, one-handed axes, staves, one-handed polearms, and one-handed swords. Some of the featured Pandaren Monk abilities are Roll (roll a short distance), Spinning Crane Kick (deals physical damage to all nearby enemies), and Statue of the Jade Serpent (Summons a statue that heals a friendly target every time you deal damage).
Here is a look at the Pet Battle System, 
The new pet-battle system looks and feels like PokeMon but with a World of Warcraft style. You can duel your friends, level up your pet and its abilities, and choose an entire roster!
World of Warcraft Mists of Pandaria Trailer