Diablo 3: Reaper of Souls Gameplay & Preview [3 Videos]
Featuring the fallen angel, Malthael the Angel of Death, as the main antagonist. Story taken place at Westmarch.
Looks like the Paladin of Diablo 3, with much emphasis on its armor and shield. "Tank made in Human Form" is what they call it.
Legendaries gets a boost in both stat & drop rate. Legendary drops will also feature more of an emphasis on modifying the skills of characters, encouraging players to think further about the way they spec their characters. Blizzard is also introducing Loot Runs, a randomly-generated 15-20 minute dungeon which promises lucrative riches if completed.
Level Cap increased to 70 & Paragon Cap is GONE. You can technically have a level 9999999 character now
Not much has been said of PVP.