The show is called “ Buffy the Vampire Slayer : New Sunnydale,” but Buffy Anne Summers is barely in it. Rather than revolving around Sarah Michelle Gellar ’s Buffy, the shooting draft for the show’s pilot episode — written by sisters Nora and Lilla Zuckerman, and obtained by Variety — introduces an entirely new set of characters, and, crucially, a new Slayer, a 16-year-old high-schooler named Nova (Ryan Kiera Armstrong). In the Zuckermans’ original draft of the pilot, Buffy appears only at the