Bryan Cranston would make an interesting choice, but it's far from confirmed. All articles about the Lex Luthor casting are still sourcing only one site.
Bryan Cranston Considers Playing Lex Luthor Metro.us
The rumor originated when Metro.us asked him if he would consider the role. His reply was as follows.
“
Give me a call,” he says with a grin. And to hear Cranston tell it, he’s already given some thought as to getting into Luthor’s psyche. “
I like Lex Luthor. I think he’s misunderstood. He’s a loveable, sweet man,” Cranston says.
That was two weeks ago, whether he has been already approached is still up for speculation. No confirmation, despite what Cosmic Book News says.