“Once Upon a Time” is going on a magic carpet ride. Executive producers Eddy Kitsis and Adam Horowitz revealed a three-minute sneak preview of Season 6 at Comic-Con on Saturday, which teased the story of Aladdin and his rivalry with Jafar. “Covert Affairs” star Oded Fehr has been cast in the role of Jafar, while Deniz Akdeniz...