It's extremely rare that the Most Unlikely Crossover pool actually lives up to it's name, but I have to agree that this is one of the most random crossovers I've seen in years.
"I tell you what, as dang 'ol soldier, I made one dem oaths that I bring that resurrection of mankind. Man, there ain't no greater glory then wanta die for glory of what ya believe in, it's like nirvana or sometin', y'know? If ya'll use this dang 'ol Titan thang to the army, we can, like...recapture this town. In the glory of dang 'ol human race, imma beg ya! Even though these is my final before bite the bullet, lemme explain to ya'll we can use this dang 'ol Titan to save the world, ya feel me?"
"I tell you what, as dang 'ol soldier, I made one dem oaths that I bring that resurrection of mankind. Man, there ain't no greater glory then wanta die for glory of what ya believe in, it's like nirvana or sometin', y'know? If ya'll use this dang 'ol Titan thang to the army, we can, like...recapture this town. In the glory of dang 'ol human race, imma beg ya! Even though these is my final before bite the bullet, lemme explain to ya'll we can use this dang 'ol Titan to save the world, ya feel me?"
I think the reason for the crossover is that Bill and Dave already resemble titans in King of the Hill. I first noticed this just watching the opening for the first time.