I'm an avid Diablo fan, and have played it since it came out ... and reinstalled and played very recently.
Firstly, destroying the soul stones should have barred Diablo and Mephisto from entering our world again, not killing them. The Three tricked Heaven into thinking that Hell was in a civil war and that the Three were exiled to the Mortal world. They tricked Tyrael into using the soulstones on them, tricked the hero into journeying into Hell, all so that Baal could climb Mount Areat unmolested.
The Worldstone was an object created eons ago. It's hinted in the lore that Heaven ordered the mortal realm by creating a barrier to the magical world, stopping the legions of Hell from invading directly and gave calm to the landscape. My theory is that these two things are one in the same and that the barrier is starting to unravel, thus the animation of the hordes of demons running through the portals.
Also, a comment on the gameplay vid. I was urked by the voice in the background. "Hey look guis! A wall of corpses!!!!"
This and the fact that I'm having awful flashbacks to WCIII. Cartoony at first, then gory at the end. Basically, I haven't seen anything new in the vid, other than their great ideas on how to replace the Necro and their hormone-packed Barbarian.
They could pull out a complete win, I don't know. They can't destroy D or DII. My childhood is safe, thank goodness.
"The thirteen saloons that had lined the one street of Seney had not left a trace. The foundations of the Mansion House hotel stuck up above the ground. The stone was chipped and split by the fire. It was all that was left of the town of Seney. Even the surface had been burned off the ground.
Nick looked at the burned-over stretch of hillside, where he had expected to find the scattered houses of the town and then walked down the railroad track to the bridge over the river. The river was there."
