Its ubisoft... so why there are people who have high expectations from them is beyond me.
I am not saying that UBI will NEVER make another good game, but a good game would be the exception, not the rule in ubisofts playbook.
All those E3 hype videos are pointless, and even more proof of how much the companies are trying to get us talking about their games, so they get free advertisement.
In case some of you need any additional information, look at the videos of E3.
Everytime the guy who presents the game starts talking about how awsome their game is (we have full dynamic this, our advanced AI that) they try to sell something, because they cant show it.
A good example of positive looks would have been Fallout 4, where they showed some gameplay and some basic, yet improved stuff over the previous game (Thou the engine looks really bad for now).