According to the The Darkess 2 panel from Comic-Con 2011, there is a live-action feature film version of The Darkness currently in development. Mandeville Films, the studio behind the Academy Award-winning The Fighter, will produce. According to Darkness creator Marc Silvestri, the film will be a full-blown, true Hollywood movie. "This will not be a watered down version of The Darkness," he said.
For more information from The Darkness panel at Comic-Con, head on over to our The Darkness Comic-Con 2011 panel write-up.