4. The Batsuit
Well, actually it's more the cowl than anything. Not to take anything away from Warner Bros Montreal's interpretation of the Batsuit it is original but it is clearly inspired by Nolan's military battle armour look made up of different protective panels. It makes sense, Bruce Wayne is only just starting out as Batman, he hasn't had time to design the bullet-proof onesie he sports in the later Arkham games. You could even say that the Arkham Origins suit looks more basic than the Dark Knight garment, with some of the panels looking a little rough around the edges and almost ill-fitting in places. What's really reminiscent of Nolan's Batmanm howeverm is the way the cowl is more like a helmet rather than a full neck and head ensemble, or a pull-over-your-face hood job. Nolan wanted Batman to be able to move his head properly for the first time in The Dark Knight - having it detached from the neck and molded around the head independent of the rest of the suit was the answer. You can see that's very much the idea that's going on in Arkham Origins.
Also take a look at the cape. It has that darker finish than the rest of the suit, much like the almost velvety fabric used from Begins to Rises.