Graphic novel fans, what do you think is still out there to be mined for the movies?

First they made the ones that even non-fans knew, Superman, Batman, Spiderman, the Hulk. Then they started to dig deeper adapting the lesser known but still popular ones like Daredevil and X-Men into films. Then they started to adapt more niche graphic novels like V for Vendetta, Ghost World, 300, American Splendor, and now they’ve taken on Watchmen, which is supposed to be the be all end all of graphic novels. So, what else is out there that those of us who had never heard of Sin City or the Watchmen or what not until the movie came about, might be treated to in the coming years? Do you have any favorites that you think would make a great film? Do you know of anything in the works that will probably be a big blockbuster some day soon? Clearly this is fertile soil for filmmakers, or has been for the past couple decades, but is it tapped out…is it a dead end now that the ultimate GN has been adapted, or is there still plenty of source material out there?