“I am about to check into the Bates Motel very soon,” said Riri in an exclusive clip for Comic-Con. “Guess what else? Guess who’s playing Marion. Yes, so all you Comic-Con fans, all you Bates Motel fans, stay tuned!” Rihanna will be playing Marion Crane, the character played by Janet Leigh in Alfred Hitchcock’s 1960 classic Psycho. Marion checked into…