Bubba Ho-Tep
A Don Coscarelli film starring Bruce Campbell and Ossie Davis. [url]http://www.rottentomatoes.com/m/bubba_hotep[/url]
I sort of agree that you cannot will a cult classic into existence. Not sure if this should be considered "just" a cult film, though. Bruce does a great Elvis, Ossie slightly less convincing as JFK (but a great senile black man who _thinks_ he's JFK).
To quote Campbell from the DVD, "a redemptive Elvis zombie movie".
Lot's of potty-humur, ho-hum action (they're old dudes!), not very scary, but an enjoyable flick nonetheless. It skewers the dismissal of elders in American society. A contemplative Elvis lives up to the failures of his own life to become the super-hero Elvis he portrayed to the public.