It may be a long way off yet and many of you won’t be interested in a demo, because let’s face it, you’ll be buying the full game. However according to Blizzard they are looking at a ‘trial’ version or demo at some point.
Good news for those who may be sitting on the fence or gamers who may be completely new to the Diablo series. It’s worth noting though that StarCraft 2 was released in July and the demo didn’t appear until December so a Diablo 3 trial version could come some months after the game’s release. It’s always a good way to pull in new gamers once the initial sales rush is over.
Source: Blues: IncGamers