This part of the vampire genre has been done a lot mind. It's the third version of Nosferatu specifically - I need to maybe give the 1979 version another go as I seem to be the only person who doesn't think it's a classic - not to mention a film they made about the original production that imagined if the main actor was really a vampire. Official adaptations of Dracula are legion, if you just count the main ones you've got the 1931 Lugosi, Hammer's with Christopher Lee, 1979 with Frank Langella, the Coppola one and all the various sequels, spin offs, versions of the story from other characters' point of view like Renfield and Van Helsing, even had a spoof with Leslie Neilson. Not to mention a lot of successful vampire films have taken it in all different directions like Near Dark or Blade. Did we need another version of the basic Dracula story?