CINESCAPE magazine's TV preview issue had the only good article I've seen about the upcoming season of King of the Hill. Here are some relevant excerpts (I'd post the whole thing, but, y'know, fair use and all):
------------------- - Peggy becom[es] coach of the high school football cheerleading squad. The aggressive cheering style she devises backfires when a team known as the "Irishmen" takes exception to the faux bludgeoning of their mascot and Peggy is accused of a hate crime. - A no-propane restriction at the Texas State Fair grill-off... so outrages Hank and Luanne that they organize a protest, eventually attracting campus radicals (including Elijah Wood) who turn the fair into a Seattle-style anti-globalization rally.
[Re the season premiere, "Patch Boomhauer," guest-starring Brad Pitt and Laura Dern] "When Boomhauer's at the gas station, he sees the one girl that could have been Mrs. Right, that he let get away," explains Executive Producer John Altschuler. "He's all excited, and then he finds out that basically she's in town because she's going to be marrying Boomhauer's brother. So you have this love triangle between these two brothers and this woman, and you can't understand a word the two [brothers] are saying."
Fans can also expect to see more of Brittany Murphy's regular character, Luanne... "She [Brittany Murphy] came to us and was actually pitching ideas to us about how to get Luanne more involved in the show," Altschuler says. "She's just truly a great team player who loves the show and does anything we ask her to do. Including, she's how we got Elijah Wood to do the show!"