I'm thinking that all three authors could lose their romance fan base in the case of those books going to the screen, cause they'd have to clean them up massively for broadcasting, to let go of the single pair system per episode/movie and go for urban fantasy in them. Personally, I'd prefer that, i.e. the greater story with all the mess going on in it, with all the couple interactions and problems, crime stories in them, angry gods and goddesses, vampires, lycans, dragons and Daimons, you name it, all of the characters specific for their own paranormal world, all of them changing and developing through time. It just depends on how much these writers are willing to let go of their romantic roots and let the story flourish in its complexity. TV/movies might do them good, or not, depending who's working on them and how, and how much cooperation exists with author. In Ward's case, I believe that TV series would do them a world of good, cause they're good urban fantasies to start with, and series would give more time for interactions to develop outside of relatively short story strictly dedicated to each couple in the books.