Last April 1st there was an announcement of the coming of Diablo III and it had a rather convincing "trailer" too. It turned out to be an april fool's prank, but this one sure looks official. I hope for this sequel to put a bit more emphasis on the story than the previous one.
I enjoyed Diablo 2, but after a while it was a rather repetitive hacking and slaying with nothing but the hope to find some particularly good item to keep you interested in the long run (just my opinion of course).