originally sanctuary was obvious to the depths of hell but not the high heavens, tyreal then found it and tried to destroy it but then decided it was good and saved it. and regarding the worldstone he destroyed it because it was corrupted supposedly, tyreal isn't trying to destroy sanctuary, nobody is trying to destroy sanctuary. Understand tyreal is a celestial being that transcends the concept of time and existence of humans. also the same goes for demons, humans are merely a blip of existence during their eternal war that seems to go on forever so humans weren't incredibly important to the two sides but now that they know all their cool powers they want them to side with them, none of them want sanctuary gone. since the sin war on all tyreal has done in regards to humans is to try and get them to side with them so they can gain an advantage but at the same time he befriended several humans
I think you just made that up as you went a long
Personally I would rather see the two lesser demons left attempt to bring back the brothers. Why? Cause lesser demons are so damn boring. Duriel and Andarial, in the end, were not much of a challange. I would rather fight the big 3 then the lesser 2.
I have a feeling we will witness his transformation live, just before we fight him and this will be the greatesst moment in d3.....and at the first time i witness it i will be like "when will he stop growing!?" heehe
I'm not some lame ass in an anime who waits for that bad ass guy to transform into super bad ass guy.
I'd take him out when he's busy being all transformy and stuff.
No matter what size he is Big D will still be called Big D in Diablo III
anyways with that said, I think that it depends, the thing that kept Diablo at his size in D1 and D2 was the fact that he was using a human's body as his vessel, but now that the world stone is destroyed I believe that Diablo can enter Sanctuary with his own body, and... well , no one knows how big his actual body is.
but we can all be sure that he will be equally impressive in both his looks and his skill arsenal if he does show up in the game.
The size of the monster will be limited to the size of your screen. I doubt Blizzard will be silly enough to make a monster bigger than your screen space. The reason WoW could have huge raid bosses was due to flexible 3rd person perspective. This game is different, because it has a fixed isometric view.