According to one of the Ubisoft’s employee’s online CV, Watch Dogs 2 might be in development. The game’s senior gameplay programmer added it in his projects list, as you can see in the picture posted below. Watch Dogs 2 appears together with Watch Dogs and its DLC Bad Blood.
A Watch Dogs sequel was suggested last year, but until now nothing official was announced. Ubisoft was contacted and asked about the possibility of releasing it at E3, but they denied it, and also after this, the game was removed from Julien Risse’s CV.