I was talking to a friend of mine and he was going on about how u only see two of the three soulstones destroyed in the D2 series and that the third one could open up a wide variety of storylines. If I remember right, Tyrael (have him as a desktop! lol) says that we don't know how the world will be after the worldstone is destroyed... That just furthers the opportunities for D3. I just saw a post that said Cain should die... I don't think Tyrael would be in D3 because I think he mentions something like the worldstone being his connection to the planet. But something like the death of Cain could be a good drama for the midpoint storyline
Anyways, just some thoughts. Sorry if people touched on these subjects in previous posts!