I don't think Blizzard's new MMO is going to eclipse the success of their current one. I doubt that's even possible. But Blizzard's success has always been anomalous.
Also, please don't assume a correlation between quality and success. Team Ico is a fine example of a quality team who releases quality products, but none of their games have ever topped the charts. Team Ico doesn't have Activision's marketing division.
Or $25 Celestial Steeds.
