From Slashfilm:
Late in January of this year, Duncan Jones (Moon, Source Code) was announced as director of the long-in-development film based on Blizzard’s game world seen in titles like World of Warcraft. Unsurprisingly, news on further developments has been slow in coming as Jones and the films producers craft a plan for the film. At the time Jones was announced, a late 2013 shoot was theorized, with hopes for a 2015 release.
This could be epic; like a Star Wars or Lord Of The Rings trilogy.