_**Not a remake, but a stand-alone sequel**_ After one of the attendees of a debutante’s ball dies in an accident in the Charlotte area, those involved in the prank-gone-wrong are targeted by a killer who wants an admission of guilt. “April Fool’s Day” (2008) is not a remake of the original 1986 film, but shares the name and a couple plot rudiments. The characters, the location and their story are altogether different, mixing in bits of "I Know What You Did Last Summer" (1997) and "Cruel Intentions" (1999). You could call it a stand-alone sequel, which is what many slasher sequels are…