Take this with a grain of salt, but this one comes to us from the reputable Batman of Film, which is why I'm willing to say there could be something to this. They've gotten these possible details about the new Batmobile via a man called Dr. Detroit:
"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 – who was very hands-on and involved in the design/building process for the new Bumblebee Camaro. Anyway, back to the new Batmobile…
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.
"Now this is pure speculation on my part, but I wonder if this “old Cadillac” be the new Batmobile? Perhaps one is being retrofitted to be Batman’s ride in BATMAN VS. SUPERMAN? There are some interesting "old Cadillac" concept cars, including cars from the '40's, '50's, and '70s (I've attached pictures of some) that somewhat resemble various previous iterations of the Batmobile from comic books, television, and film. In recent years, there have also been several Cadillac concept cars (like the Aera and Thorium Fuel concepts) that fit the bill of a high-tech, supercar-style Batmobile (with some Bat-themed modifications, of course). After all, basing a Batmobile on an old concept car has precedent as the '1966 Batmobile' from the 60s BATMAN TV series was based on the 1955 Lincoln Futura."
So CBM readers, maybe we could get a car that looks like this.
Or even this? (I doubt they'll go this extreme.)
When Batman vs. Superman finally begins principal photography, I'll do my best to be an extra in the film. Though if I do get a job having to do with the production, I won't leak anything. I plan on adhering to any NDA I would have to sign.