It seems like previous predictions were right on the money. Well, at least the year was right. The latest tweet from the Warcraft Twitter account confirms a release date for the Warcraft film:
We’re pleased to announce that Pictures’ WARCRAFT will be released by on December 18, 2015.
That's both a release date and a studio confirmation for you, all in one tweet.
Keep your schedule clear for mid-December a couple of years from now!