Tom Cruise v South Park

While John Travolta was in Australia in his role as ambassador for Qantas, back home in America TV network Comedy Central's South Park program was mercilessly taking the mickey out of him, his religion and especially Tom Cruise (who gets into a closet and won't come out). Will Cruise sue? He certainly has a track record in that department, but I guess the defence would be that South Park is such an outrageous, over-the-top parody that no reasonable person would take it seriously. That'd be what they're hoping at Comedy Central, I suppose