Yeah, it happened to Tomie, Ju-On, Ringu, Uzumaki and countless others in the past. We all know that good suspense and horror manga can make excellent horor movies (when done by the japanese and not screwed up by American versions of them)
So I decided to make this thread where you can post manga that would make good horror flicks.
For me, definately Ohba Tsugumi and Obata Takeshi's Death Note and Okyu Hiroya's GANTZ would make great horror movies. These manga's plots are so well woven that you are always on the edge of your seat and trying to figure out something of importance to it that they have the makings of great horror films. What are some that you think would make excellent horror movies?