We haven't heard much about Watch Dogs since its delay last autumn. While it isn't much to go on, a Portugese retailer named Fnac has listed the ship date for Ubisoft's highly anticipated open-world game as April 30th. It's a bit early to tell whether this information is reliable or not, though this does match up with the established launch window. As of now, Ubisoft is remaining silent regarding this information.
Major titles typically see a Friday release over in Europe (as opposed to North America's Tuesday launches), which may help us pinpoint the title's exact launch date. If this listing is to be believed, an April 30th ship date, which falls on a Wednesday, could signify an April 25th release.
Of course, this could just be the latest in a long line of speculation surrounding this release. One recent rumor stated that Ubisoft was planning on canceling the Wii U version of Watch Dogs, while a fraudulent trademark abandonment claim had some thinking Ubisoft was ditching the IP altogether. Hopefully Ubisoft will make an official statement within the near future.