When did Six Flags start airing commercials linking together all of their parks ?
" Time Warner " saw the opportunity to advertise and promote their latest movies through their Six Flags parks , so they added " The Joker 's Revenge " , the first " Vekoma " " Hurricane " roller coaster in the United States and the first Vekoma roller coaster to run backwards a full circuit in the " Fiesta Bay Boardwalk " section next to and along the parks quarry wall .