It seems we may not be done with residents of Star City quite yet. It has been revealed that during Arrow's final season, a backdoor pilot will be included focusing on Mia Smoak (Katherine McNamara), Laurel Lance (Katie Cassidy), and Dinah Drake (Juliana Harkavy). Showrunner Beth Schwartz, Marc Guggenheim, Jill Blankenship, and Oscar Balderrama are…