Has it been shown that this is a direct result of the movies? As it is, Joey Q made a lot of good business decisions in the beginning of his tenure. I think it's pretty clear the movies have little effect on sales, otherwise a Blade title would've actually done well in those days.
I was talking about this with a friend of mine lately, and it basically comes down to this: Me: "You loved The Dark Knight, didn't you?" Him: "Definitely, best movie of 2008." Me: "Did it make you want to read Batman comics?" Him: "No."