At this point, it just feel like Ubisoft has this idea in their minds about how they want to "unveil" Watch Dogs 2 to the world that they just can't let go of. You have to think the game is one of their intended emotional climax points for their Press Conference at E3, and based on Yves Guillemot's sentiments, the company is putting a lot of stock into the game.
Ubisoft has let a few people into the loop already it seems. YouTuber, TheRadBrad recently posted an picture on Twitter of a Watch Dogs 2 gift box he received from the company. Check it out:
Thanks @Ubisoft for the Watch Dogs 2 gift box. pic.twitter.com/eCIkwoYXA8
— theRadBrad (@thaRadBrad) June 1, 2016
There have been leaks and rumors surrounding the game's existence as well as a Pre-Order page for the game at GameStop UK, so anything other than a major presence at E3 2016 would be a major letdown.