Marvel Studios and Universal Pictures have announced that Jonathan Mostow will take over writing and directing for Sub-Mariner.  Mostow directed Terminator 3: Rise of the Machines and is set to direct Terminator 4.

 

Chris Columbus had been named producer and director in 2004 (see 'Universal Wants Chris Columbus For 'Namor''), and David Self wrote the first draft of the screenplay.

 

It's unclear why Columbus left the project, but the producers see Mostow as someone who fully understands the Prince Namor character.  They have been waiting for Mostow's schedule to open up for some time.