David S. Goyer feels the need for speed. The Blade: Trinity director, who wrote all three movies about the comic-book vampire hero, has his next comic book adaptation picked out. According to Variety, he'll write, produce, and direct a movie about DC Comics hero the Flash for Warner Bros. ''Flash is my favorite of the properties,'' said Goyer, who is one of the screenwriters who adapted DC's Batman into next year's Batman Begins for Warner Bros. The Flash is a hero of the same late-1930s vintage as Batman, a chemist who becomes the fastest man alive after exposure to irradiated water. ''I think the character of the Flash, who moves faster than the speed of light, opens itself up to rich cinematic and story ideas,'' Goyer said. Plus, the movie only needs to be seven minutes long.