Blizzard is no longer opposed to the idea of re-inventing the MMO as a free-to-play title, Chilton added, although the team is still unsure of the success rate of free-to-play games over time.
"For Blizzard it makes sense [to go free-to-play] at some point. But a lot of the risk is in making that transition. You hear stories about developers going free-to-play and getting double the number of players, but you don't always know it works out that way and how long it stays that way. We really don't know what the rate is before people drop off and lose interest."