The classic Batman costume is one of the best in comics. It's a bit egotistical of these artists to think that they can improve it. The Gary Frank drawing would look pretty good.... if you changed all the bits he's meddled with back to the classic costume.

It's like he's embarassed by the idea of Batman wearing shorts over the body-suit.... so he puts him in a wrinkled pair of long johns. Riiiight. Don't like any of the changes. Like his drawings of Bruce Wayne and like him as an artist generally..... but these changes are (a) unnecessary and (b) stink.

I think it's more because the Burton's Batman movie got away with changing it to huge success in the '89 movie. That seemed to give some kind of "green light" that you can tweak Batman's costume and it will still work. I don't know that there was much done to the Batman costume (other than adding the yellow oval) prior to that.

And I absolutely hate that Carradine quote/speech about Superman being born Superman. Obviously he (or Tarrantino) never read "Man of Steel." Or if so, they missed the point.

Not to be a stickler but Man Of Steel IS a re-intepretation of Superman and that Superman is dead.  Tarantino could have been referencing Superman's first appearance in Action Comics. 

As for Batman's design changes I think DC Comics gives their hot shot artists free will in whatever changes that will pump up their egoes.  To DC they think by doing this the book will stand out from the rest of the many Bat-titles currently running.  Gosh too many spin-off titles at that.