I really liked the Tumbler, but I would like to see something more performance driven (no pun intended). Maybe something along these lines,
I think the plating is a little much, but I like the idea of having a car that car out perform and out muscle anything else.
Also, it doesn't have all the bat insignia stuff all over it. How could Wayne buy or manufacture that in secret? I giant car with rocket engine and his logo plastered all over the damn thing.