Apart from a huge poster of Assassin’s Creed hanging on the Ubisoft building in Watch Dogs 2, you can stumble upon a character at the Stanford University that works for Ubisoft. If you come closer and hack into his phone, you will hear an interesting conversation.
The person of interest is being accused for leaking information about the upcoming Assassin’s Creed game. He is also reminded about the incident with the Assassin’s Creed: Unity leak. This is a really cool easter egg, and it looks like Ubisoft decided to break the fourth wall a little bit harder this time around.