Players of Hearthstone will be able to walk the Mean Streets of Gadgetzan (in a collectible card game kinda way) from 1 December, when the expansion is released. That news comes from a recent livestream, in which the release date is given at around 1 hour 18 minutes. Basically right at the end.
Before that, it shows Blizzard employees having a few rounds of Mean Streets of Gadgetzan and showing off a few cards that haven’t been seen prior to today. The expansion itself will add 132 new cards to Hearthstone, including several of the new ‘tri-class’ variety.
The stream presenters note that, depending on your world region, the release date may strictly be 2 December in a local time-zone. Otherwise, expect it at the very beginning of the month.