This a blood-soaked horror convention will be filled with vendors peddling the latest in terrifying costumes, artwork and just about everything else under the eclipsed sun. Expect guest appearances by Linda Blair of “The Exorcist,” Tony Todd of “Candyman,” Ernie Hudson of “Ghostbusters,” Sid Haig and Bill Moseley of “House of 1000 Corpses” and “The Devil’s Rejects,” wrestling legends Kurt Angle Jerry “The King” Lawler and, best of all, Gary Busey of “Predator II” fame.