It looks pretty badass from what I've seen.
I'd renaissance times instead of medieval.
I see that you get a hidden pistol, and 2 hidden blades instead of the one, you can disarm your opponents, and you can use just about any weapon you can get your hands on in this version too.
Oh, you can also get a glider that lets you fly around which will come in handy on a few missions where you can only get to your target by air.
I also here there are more finishing moves and it remains that there is an epic amount of freedom in the game which it would appear that they added in swimming as well.
Personally, I can't wait till it comes out. <3

Gameplay Trailer