 "Dracula II: Ascension" is a sequel to "Dracula 2000," with the ageless vampire again returning from apparent extinction. The twist is that Dracula s blood will be used by a researcher (baroque performance by Craig Sheffer) to reverse the effects of a crippling disease; Sheffer s assistants (read: vampire fodder) will help. Joining this scientific survey is long-haired vampire slayer Jason Scott Lee, who seems to have stalked in from another picture--but never mind Roy Scheider, whose wizened priest might be onscreen for all of 60 seconds.