Oh, what could’ve been. Ryan Murphy revealed what Ariana Grande‘s role would’ve been if she’d joined the cast of American Horror Story season 13 as originally planned. Speaking with The Hollywood Reporter Wednesday night in New York City ahead of the premiere of AHS: 13, Murphy revealed that Grande was set to reprise her role as Chanel #2 from Scream Queens for the new season of American Horror Story. The potential crossover would’ve brought the worlds of Murphy’s American Horror Story and Scream Queens together for the first time, but Grande’s touring schedule for her Eternal Sunshine Tour ultimately prevented the appearance. “It was…