Blizzard Entertainment President Mike Morhaime formally announced Diablo III during the WWI’s opening ceremony this morning, not that this will come as a surprise to anyone with the Diablo III forums already active on the official Blizzard site and rumours running rampant for nearly a fortnight.

After recapping on the success of the previous Invitational held in Korea, Morhaime premiered a trailer and then demoed a level playing as a Barbarian and a Witch Doctor, showcasing some of the improvements over the original game as well as giving attendees a hint at what they can expect from the final product. This includes a new UI in place of the potion belt and the ability to play the game just by using a mouse. Similarly the health system has been augmented by God of War and Devil May Cry style red globes which replenish not just the health of the character but also those near by.

Essentially, [Blizzard is] creating a new Iron Man every month, in terms of the gross revenue they're generating as a studio. Any movie studio would be shouting about that from the rooftops...