Blizzard Entertainment Interview

MTV Multiplayer has posted the results of an interview they did with Blizzard's Paul Sams and Frank Pearce during the company's Worlwide Invitational event. Topics include why Diablo III isn't an MMORPG, making a game that competes with World of Warcraft, a possible new game franchise, and more.
On making another MMO that would compete with (World of Warcraft):

(If we wanted to make was another MMO, then we would do that. I don't think we're scared to do that.)
Sams: Well, it's certainly a conversation that we've had. The idea of doing games that could compete with (World of Warcraft) is something that I think a lot of people would say, (Geez you shouldn't do that.) But I do believe that if the game that we wanted to make was another MMO, then we would do that. I don't think we're scared to do that. And I think that if our developers come up with the next great game that they want to make and it's an MMO, then we'll do that. We would go about trying to make the best MMO of all time, and to try to eclipse (World of Warcraft,) if we were ever to do such a thing. But it really all comes down to what type of game we want to make, and the people that we have working at the company.

Pearce: Whether or not it makes sense to have another subscription-based MMO competing against (World of Warcraft) within the Blizzard space is hard to say. At some point, some product's going to come along and cannibalize the (World of Warcraft) player base, and if it's going to happen, it'd be better for us to cannibalize our own player base compared to having another publisher do it. But our hope is that (Starcraft II) and (Diablo III) will be games that can be enjoyed by our fans simultaneously with (World of Warcraft.)