As litigation intensifies over who holds ownership rights to "Superman" and "Superboy", the CW Network reports that Smallville, the Vancouver-lensed TV series featuring 'Clark Kent', aka 'Kal-El' (referred to in the series as 'The Blur') will return fall 2010 for an unprecedented tenth season.While showcasing DC Comics' superheroes, Smallville has also done a credible job of showcasing Canadian actors including Serinda Swan as 'Zatanna' and Laura Vandervoort as 'Kara' (aka 'Supergirl').Starring Tom Welling, Smallville recently moved to Friday nights, currently ranking as the network's #1 series in its time period among men 18-34 and men 18-49.Smallville has also improved CW's overall ratings in its Friday 8:00-9:00 pm time period by 67% among adults 18-34, 200% in men 18-34, 75% in adults 18-49, 183% in men 18-49 and 74% in total viewers (3.12 million).Smallville was developed for television by Alfred Gough & Miles Millar, based on the DC Comics' characters. Kelly Souders & Brian Peterson currently serve as executive producers with James Marshall, Mike Tollin, Brian Robbins and Joe Davola.Smallville is produced by Tollin/Robbins Productions, Millar/Gough Ink and Warner Bros. Television...