The feud between vampires and werewolves is far from over it seems. What with the moderate success of the third Underworld film we are now to expect a fourth movie, this time filmed in 3D.
No sense of cast or plot as yet and both will dictate each other as many characters died in the "current" timeline whilst others (Selene)do not yet exist in the prequels.
Series creator Len Wiseman originally stated that he had planned out a massive story to be told and i would imagine that his script notes will be the place they jump off from with the new story. Except i can't see Kate Beckinsale or Scott Speedman returning unless Wiseman himself does. Which most likely won't happen.