Lillith bathing in blood is a clear reference to Elizabeth Bathory. Elizabeth Bathory was a sixteenth to seventeenth century countess, who supposedly killed numerous young women and bathed in their blood, in an attempt to retain her youth. She, along with Vlad III the Impaler, is one of the most common historical figures to be re-imagined as a vampire in popular culture.
During publicity for the first film, Melissa George had expressed interest in reprising her role as Stella Olemaun in the sequel. According to producers, scheduling conflicts forced George to bow out and the role was recast with Kiele Sanchez.