Watch Dogs 2 will be officially revealed tomorrow with a new trailer ahead of E3, but already we know two key pieces of information - its setting and release date.
This information comes via a banner advertisement which unintentionally went live on IGN, before quickly being removed. Before that though, screenshots were taken, which reveals that San Fransisco is indeed the setting for the game, as the ad shows the Golden Gate bridge, as well as a release date of the 15th of November (at least in North America, but it is likely a worldwide launch).
Tomorrow's official trailer will probably confirm this, as well as show off the game for the first time.