This film would be Jonathan Nolan's directorial debut, and while many people wonder why such a big budgeted film would be placed in the hands of a novice, it is said that Christopher Nolan would be there to guide him through the process.
In other news about the film, casting is currently underway, and there are rumors that one actor that has been involved in auditions is Zachary Levi, from NBC's "Chuck". No one knows if he is auditioning for the lead role, which could possibly work out, given his Clark Kent-like characteristics.
There is currently no official confirmations of any kind about casting or directing.