San Diego Comic-Con - Batmobile (back)

I have absolutely no idea what the back area really looks like other than guessing how Lego would tackle it themselves and glancing at the side shots eyeing the separation lines between bricks. Plus I compared sources of images for the box on eBay and the original car from the 1960s. The dome piece does exist but not in that color without any droid printing from Star Wars I think. I would not be surprised if Lego made at least that one piece exclusive to the set just so there truly is something unique besides the box it came in.