I am the villain of the story.

He is back from the death to make Clark the hero that he needs to be! Michael Rosenbaum is returning to Smallville on its final season. Three long years has passed since we saw Michael in Smallville and now after a long conversation with the producers but more important with Tom Welling, he is on its way to the little town that put him on the map! Smallville will end on May 13 and we'll be more than glad to see Michael on the series finale.
“I’m delighted to return for the series finale," Mr. Rosenbaum expressed.
“I’m simply doing it for all of the fans out there who made Smallville the great success it is. I appreciate all of their passion, their relentlessness, and even their threats. Ha ha.”
“I can’t wait to hug the old crew back in Vancouver one last time and see all of my old friends once again. Oh, and for Lex to become the bad-ass he’s destined to be,” he continued.
Now every peace of the puzzle is complete, the hero and the villain, the friend and the foe, Clark Kent and Lex Luthor have to see each other once more and face what at the beginning of the series was destined to be... the end of Smallville.