The developers made a pretty big fuss about the first game, and its revolutionary physics and AI. However the final product was rather disappointing, while the physics were, without doubt, revolutionary, it was only applied to a small few objects in the game. With luck the sequel will apply the physics to much more of the environment.
One thing O am looking forward to is dismemberment. Apparently this has been confirmed, although I have only read this from one source. It would definitely be a good thing, there is dismemberment in every single Star Wars movie, but to my knowledge, only 2 games actually use it.
The AI in the first game was definitely good, but it only showed how good on very rare occasions. One example which impressed me was when I had Starkiller positioned close to explosive objects, they would shoot at the explosives, rather than Starkiller. But the let down is that they rarely take cover. I know that there isn't much use for cover when your enemy primarily attacks up close, but it is something I would like to see in the sequel.
Anyway, I am looking forward to getting more information regarding this game.