We reported earlier this week that Smallville will end its 10-season run with a two-hour finale on Friday, May 13, and, apparently, Lex Luthor will not be making an appearance. Michael Rosenbaum has turned down numerous offers to return as Lex Luthor in the series finale and it seems there is little hope he will return. Here's what an inside source had to say about Michael Rosenbaum.

"He has put the show behind him and moved on. He's pursuing his other creative outlet [writing]. By all indications, he is not going to be involved."
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The offer still stands for Michael Rosenbaum to return, although production wraps in six or seven weeks, with only three episodes left to be shot, including the two-hour finale. Michael Rosenbaum portrayed Lex Luthor for the first seven seasons of Smallville.

Apart from seeing the Man of Steel finally put on the suit and fly like he means it, a re-appearance by Rosenbaum is the top request by fans looking for creative closure in Smallville's final season. Rosenbaum played Superman's arch rival for seven seasons on the show and Smallville ends its epic 10-year run this May. Producers have publicly taken a "you'll have to tune in to find out" stance when asked whether Rosenbaum will show up, all the while naturally hoping the actor will change his mind.

When we spoke to series star Tom Welling at Comic-Con last year, he told us Michael Rosenbaum's return was necessary to create a proper ending.

"It's imperative that Lex return for the climax of the series."

As of now, it doesn't seem that will happen, but we'll be sure to keep you posted if anything changes regarding Michael Rosenbaum's return to Smallville.