John Barrowman Joins The CW’s Arrow

The magazine speculates that the character could be Stanley Dover Sr. (The Star City Slayer). Who do you think it could be?

Arrow stars Stephen Amell as Oliver Queen, Colin Donnell as Tommy, Katie Cassidy as Laurel Lance, David Ramsey as John Diggle, Willa Holland as Thea Queen, with Susanna Thompson as Moira Queen and Paul Blackthorne as Detective Quentin Lance.
 
The show premieres Wednesday, October 10th at 8 p.m. ET/PT.
 
(Photo credit: WENN.com)