Diablo MMO

"There's no discussion about a Diablo MMO anymore. It was a really interesting idea back when we were into it, but I think Diablo has a really strong fantasy on its own. Having a thousand people playing it with you on a server doesn't dramatically increase it. We've learned to love the smaller, more focused party experience of four people. And some people are like, 'Why don't you do five?' I mean, we could, but kinda built the game around four people in mind. So the temptation of expanding the social circle has fallen by the wayside as we learned more about what we enjoy about Diablo."

- Kevin Martens

A Diablo MMO was intended for development by Blizzard Entertainment. It was the goal of the Diablo III development team to "evolve" the setting in such a manner that it would be able to support an MMO (Jay Wilson had previously voiced the opinion that the lore as it stood in Diablo II was not diverse enough to support an MMO). It has been postulated that the Auction House and always-online requirement of the PC version of the game were signs of this.

The idea has since been dropped.