Warner Bros. Interactive Entertainment has teased new forthcoming DLC for Batman: Arkham Knight, which points to the Tumbler being introduced.
The Tumbler was introduced last decade in Christopher Nolan’s Dark Knight trilogy of films, and was Batman’s primary method of transportation. The trailer shown below details the 1989 Batman Movie pack, but you can catch a brief glimpse of the Tumbler at the very end.
https://www.gamespot.com/videos/embed/6426565/
Officially, Warner Bros. Interactive Entertainment has never confirmed that the Tumbler would be coming to Arkham Knight through DLC, or any functions it would have, including being able to transform into the Batpod and what gadgets would be included.
The 1989 Batman Movie pack, shown off in the trailer, contains the suit worn by Michael Keaton in the 1989 Batman Returns film, as well as two brand new race tracks for the Batmobile, and is available to purchase right now at the standalone price of £1.69/$1.99.