Blizzard announces Diablo III: Reaper of Souls, saying the first expansion for Diablo III will raise the game's level cap to 70, add new randomized and end-game content, and more, though there's no word that it will remove the Auction House that admittedly harmed the game. This trailer is the opening cinematic, with a link in the description back to the Reaper of Souls teaser page discovered last week, showing the action/RPG expansion will focus on destroying the soul stone that keeps causing so much trouble in a conflict against Death (and not the sexy Thanos' girlfriend version). There's also this gameplay teaser clip which introduces the new Crusader class, new environments, new monsters, and more. Here's part of the announcement: :

In addition to taking the story of Diablo III from the legendary city of Westmarch to the unhallowed halls of the Pandemonium Fortress in Act V and introducing the incorruptible Crusader class, Diablo III: Reaper of Souls increases the game’s level cap to 70. Players continuing on with their existing Barbarian, Witch Doctor, Demon Hunter, Wizard, and Monk characters will benefit from an array of fearsome new spells and abilities as they advance in level.

The expansion also accentuates the key features of the Diablo franchise, with a greater emphasis on randomized environments to explore; epic new quests; horrific new monsters to defeat; and substantial updates to the loot experience, enabling players to further customize their characters with new and improved multilevel Legendary items, new Blacksmith and Jeweler item-crafting options, and more.

Diablo III’s Paragon progression system is also being majorly upgraded for the expansion, adding even more end-game character advancement and replayability. Two new game modes—Loot Runs and Nephalem Trials—are being added as well, providing fun and rewarding challenges for players to tackle when they’re not busy saving the world.

Malthael, the fallen Archangel of Wisdom, returns as the Angel of Death in Diablo III's first expansion set: Reaper of Souls. Having seized the Black Soulstone and slain most of the guards protecting it, it now falls to players to track down Malthael and stop him before he unleashes irreversible havoc on the world. Fortunately, a new hero is ready to join the cause and bring Malthael to justice—the Crusader, a fierce melee warrior whose command of the battlefield is matched only by his unwavering conviction and uncompromising dedication to the Light.