Ubisoft
All the concept art was worked on by Khai Nguyen, some of the images included are a female Assassin, an idea that Ubisoft toyed around with for a while, A hint into co-op where the studio debated whether co-op was going to be in or out. You can also see the first appearance of the Assassin’s Creed staple the hidden blade also.
There is a lot of neat images here go on and check them out.
Head on over to the Assassin’s Creed Facebook page for more information.