Comic-Con: ‘Arrow’ Debuts Season 5 Trailer, Sets Katie Cassidy’s Return

Arrow just revealed the resolution to one of its biggest cliffhangers of season four.During the show’s Comic-Con panel Saturday, executive producers Marc Guggenheim and Wendy Mericle debuted the season five trailer, and the footage finally revealed the promise Laurel (Katie Cassidy) made Oliver (Stephen Amell) agree to right before she died. “You’re instinct has always been to go it alone,” she told Oliver while laying in her hospital bed. “Ollie, you can’t. ...