THR reports that former Shield writer John Hlavin will write the screenplay for Underworld 4. The fourth installment in the franchise is supposedly going to be shot in 3-D and will set up another trilogy of Underworld movies. Hlavin wouldn't say too much about the plot, but he did note that "it's not a prequel."
It will satisfy old fans and excite new audiences, meaning that we don't want to redo the first three movies, so steps are being taken to honor what fans have loved but at the same time introduce fresh elements.
Len Wiseman, director of the first two Underworlds will produce, while neither Kate Beckinsale, who starred in Underworld and Underworld: Evolution, nor Rhona Mitra, who starred in Underworld: Rise of the Lycans, are signed on to return. However, Beckinsale has said that she could be interested in returning if she liked the script.