Like the silliness of Reaper? Fan of Summit Entertainment’s Twilight? Then you might be in for a treat with CW’s new show Vampire Diaries, which has been greenlit for a pilot episode set to air this fall. Diaries, from WBTV and Alloy, is based on Alloy’s 15-year-old series of novels, which are enjoying a resurgence with their reprinting in the wake of the “Twilight Success.” It centers on a tragic young heroine who is the object of passion for two vampire brothers — one good, one evil — who are at war for her soul and for the souls of her friends, family and other residents of the small town in which she resides. Kevin Williamson, creator of “Dawson’s Creek” and the Scream feature franchise, wrote the script with Julie Plec.