Director Shane Black, who is also working on Iron Man 3, told a crowd during his panel at the Long Beach comic-con on Saturday that Warner studio execs wanted to make some changes to the Death Note story and that he fought to keep it true to the original.
One change the studio wanted to make was to give Light Yagami a backstory that would explain more fully his penchant for evil. Specifically, they wanted him to have murdered a childhood friend when he was younger. I would think that would take away from the actual power of the book …