Five To Doomsday

It's easily missed, but in the middle of this interview with  Five chief executive Dawn Airey, it's noted that the channel are making a documentary about the Doctor Who "phenomena". 

Not since BSB Galaxy has a commercial channel entertained such an idea.  I can't imagine that since it is on a rival channel it's going to be a puff piece.  Does anyone know anything else about this or who's been interviewed for it?