The following contains MINOR SPOILERS for Season 8 of The CW show "Smallville." In the wake of the cast exodus from "Smallville," fans of the series have something to be thankful for ... the full-time addition of DC Comics hero the Green Arrow. The emerald clad archer -- played by Justin Hartley -- will be appearing on a permanent basis in the eighth season of the superhero series in an attempt to bring a familiar face to the series, especially due to the many changes the show will go through next year. However, unlike the previous Green Arrow story lines, the new episodes of "Smallville" will focus more on Ollie's mysterious billionaire past instead of his twilight identity as a fully-formed superhero. At the end of the seventh season, both Michael Rosenbaum and Kristen Kreuk (Lex Luthor ...