Marc Malkin Senior Film Awards, Events & Lifestyle EditorBetty Gilpin insists she doesn’t know exactly what’s going happen during the fourth and final season of “Glow.” The Netflix series had started production on the season when the coronavirus pandemic hit.“I know generally what’s going to happen,” Gilpin, who has earned two Emmy nominations for work as Debbie Eagan on the show, says during an appearance on Thursday’s episode of the Variety and iHeart podcast “The Big Ticket.” “We were about