There have been lots rumours related to Ubisoft games in fireden like Assassin Creed code name “Legion” and also Watch Dogs 3 which is plan on release this year 2019. The location will be set in London as teased in the Watch Dogs 2 ending showing a .wav file with longitude and latitude title. The game will focus more on the hacking-related elements and will have only small scale confrontations.
In the Q3 quarter earnings report, Ubisoft is revealed to plan to launch 3 or 4 triple A games in the next fiscal year (April 1, 2019 – March 31, 2020) so Watch Dogs 3 might be one of them but of course specific news might even be announced this coming E3.