After taking over for Bryan Singer on Bohemian Rhapsody and going on to direct Rocketman, Dexter Fletcher is ready to tackle a new challenge, and to that end, he has signed on to direct Renfield, a monster movie centered on Dracula's henchman R.M. Renfield that is in the works at Universal, Collider has confirmed. Ryan Ridley (Rick and Morty) is writing the script, which is based on an original pitch from The Walking Dead creator Robert Kirkman, who will produce via his Skybound Entertainment banner along with David Alpert, Bryan Furst and Sean Furst. In Bram Stoker's …