In an interview for MTV, Jay Wilson said that Diablo 3 “will round out the story arc set up by the previous two games.”
“We also tried to focus a little more on bringing characters back, and not just from ‘Diablo II’ but from ‘Diablo I,’” he said. “We feel like a lot of the focus is on ‘Diablo II’ but ‘Diablo I’ started it all and has a lot of really good stuff on the gameplay side and on the character side. So people can expect to see characters from ‘Diablo I,’ more characters from ‘Diablo II,’ and characters from some of the books. We’re definitely going to bring a few of them in.”
The quote that really matters for me, however, is this one:
And while “Diablo III” ends the trilogy, fans needn’t worry — it’s not the final curtain for “Diablo.” “We’re not saying this is the end of the ‘Diablo’ universe, but we are trying to bring this storyline to a close,” Wilson said. “It’s not just ‘Diablo III’ — we’ve got plans beyond.”
Now, that’s finally an admission that no one at Blizzard is crazy enough to kill the goose that lays the golden eggs. Who knows… maybe we’ll see a Diablo movie soon?