Underworld is an action horror film series created by Kevin Grevioux, Len Wiseman, and Danny McBride. It follows characters who are caught up in a war between vampires and werewolves. Most of the films star Kate Beckinsale as Selene. From Wikipedia
The scrapped live-action series was set to explore the galaxy's criminal underbelly with a massive budget and mature themes, but never made it past development.