This same point was made by [[Michio Okamura]]'s biography when he left Blizzard North to co-found [http://www.hyborealgames.com Hyboreal Games] in December 2005 (now became [http://www.uipacific.com UI U.I. PacificGames]in late 2006) in December 2005; his bio was similar to Stefan's, in that it initially said his work at Blizzard North was on an "unannounced sequel," before the wording was changed to "unannounced project." Given that the only games Blizzard North ever released were in the Diablo series, and that we now know Warcraft and Starcraft games were being worked on by teams at Blizzard Irvine, it's pretty clear that the only other possible game world to set a sequel in was the world of Diablo.