An advertisement on IGN (pictured above) that went up by mistake early this morning says Watch Dogs 2 launches Nov. 15.
That information was supposed to have been given during a big reveal event at noon tomorrow, for which Ubisoft put up a countdown yesterday. The ad also confirms that the game is set in San Francisco, which Kotaku had reported earlier this year.
Watch Dogs 2 will join games such as South Park: The Fractured But Whole, Tom Clancy's Ghost Recon Wildlands and For Honor as showpieces of Ubisoft's E3 2016 news conference. For more on what to expect going into that keynote, see Polygon's preview.