I'll tell you what turns me off, because movies and other tie-ins can in fact generate interest and motivate me to head to the comic store to check out the books. Then I get there and find a dozen different titles varying in number range from #1 to #600+, and I have no idea which one to buy. More often than not, I'll buy none, or fall back on something a little easier to grasp (Walking Dead, Fables, etc)
The market is absolutely over-saturated. If they want to generate interest, maybe they shouldn't relaunch 52 new titles at once. It's mind boggling. How can you expect a comic to sell well, on its own, when there are 51 other titles (from one company alone) vying for attention?
Marvel and DC release more and more spin-offs and mini-series in the hopes of generating more revenue, but all they're really doing is turning people like me off to the whole thing.