The WB has already removed its new primetime animatedseries MISSION HILL from its Friday night line-up due to poor ratings. (Itspremiere episode finished 115th in the ratings for the week of October 4 -10.) It's expected to return as a midseason replacement. New episodes of SOUTHPARK return beginning next Wednesday, October 27 at 10 pm on COMEDYCENTRAL, with an all-new Halloween special, KORN'S GROOVY PIRATE GHOSTMYSTERY, guest starring the band, KORN. . . MTV is developing an animatedhorror anthology called DEAD TIME STORIES, created by Mike Dougherty(SEASON'S GREETINGS, a short film). . . Subscribers of TDK, Denmark'slargest cable operator, were polled and voted to include Cartoon Network ontheir system, the only children's channel to receive that honor.