"Duuuhh, hey Bats...what's goin' on?"
One day I would like to see someone with an actual comic book physique play a superhero in a movie. Unfortunately, most people who fit that description can't act...except Arnold Schwarzenegger of course.
I would also like to see someone doing some of the amazing acrobatics Superman and Batman have done in the comics and cartoons...definitely not enough of that in live action movies. I thought someone doing a review of a Parkour-heavy movie made a good point in suggesting, "this is what Batman should be doing in his movies" (jumping from rooftop to rooftop and such).