TVGuide has published their article dedicated to Smallville’s finale season on their website. It also includes quotes from Tom Welling himself. In the article it says:

Tom Welling knows the answers, but after a decade playing pop culture’s most famous secret identity, he’s learned a thing or two about keeping his mouth shut. “This show, to me, has always been about Clark Kent — it hasn’t been about Superman,” he says, while taking a break from filming a Phantom Zone sequence for the April 29 episode. “And it was very important at the end that we make sure that we wrap up the Clark Kent story.”

To read the full article go HERE and discuss all spoiler talking go HERE.