There are fans, and there are fans! The dude who single-handedly built the above Tumbler from Batman is definitely the latter. According to the builder:
"All parts are scratch built, cept' tires, rims, brakes, engine, etc.. meaning all bodyparts, brackets, just about everything external on the car. Yes, I will do a batpod, and TDK suit for myself. I love building this stuff."
Next up: A Batpod and the Batman suit!