As it turns out, Arkham Knight is almost completely about the Batmobile, to the point that it makes you wonder how Batman has ever been able to get anything done without it prior to Arkham Knight. By the end of the game, I was half expecting Bruce to not be able to reach a high shelf in his kitchen without his trusty metal steed.
For the most part, Arkham Knight helps the trilogy avoid utter failure. While the game isn't perfect, it does enough well to be just as engaging and intriguing as the previous two Arkham titles. I think that if Arkham Knight didn't feature the Batmobile, it would feel too similar to Arkham City and leave a stale taste in the mouth of fans.