I feel the opposite. Its how everyone feels about Spider-Man. We've seen the origin story a bajilion times. We've seen the stories unfold many many times. Why do we need to see them on the big screen again? Why do we need to see Bats' parents die? Why do we need him to only just meet Harley? Doesn't a hardened, grizzled Batman make for a far more interesting hero?
And honestly, an experienced Bats makes so much more sense than a novice one for what they're going for. Batman NEEDS to be experienced and have some considerable years under his belt to be able to lead a Justice League (let's face it; Batman is the de facto leader of JLA). I think what they'll be going for is along the lines of "Batman is the superhero they needed to pull everyone together and finally assemble JLA" and that makes PERFECT sense.
meh. I think this movie is going to be damn good. I don't give a shit about "Hnnngggg too gritty". I like the variety DC is bringing to the table. It's not dealing with themes of "What would happen if we brought the real world into comic books?" (Marvel is doing this) It's more dealing with "What would happen if we brought comic books into the real world?" which is so much more interesting because we get into questions about what would happen if humanity had a single benefactor that solved all of their problems - what would happen if they became too reliant - what would happen if that benefactor failed to prioritize properly? All of these things are so much more interesting than the themes that Marvel has touched on (They never really touch any themes aside from the most primitive comic book questions)