Less of a tank and more of a luxury car model for our treasured Batmobile?
"The Batmobile is currently being designed and built by General Motors at the GM Advanced Design Studio in North Hollywood. This is the same team who most recently designed and built the vehicles for Transformers 4 with Michael Bay. … It will definitely NOT have a military look like The Tumbler from [Chris] Nolan’s Dark Knight Trilogy."
"As of about four weeks ago, it was still 'pictures on the wall' – meaning nothing had actually been built yet. An 'old Cadillac' will feature prominently in the film. When I remarked to my source that the Cadillac Sixteen concept car from a few years back looked a lot like a Batmobile, he stayed mum."
Most likely a more classy mobile being set in a different universe and possibly a more comic book based world then a serious real world tone hoping it's got the Tim Burton Batman feel to it but we'll see later on when more info comes to light.