Psyclone: Yeah I know you're being silly but . . .
I think its the cart before the horse. They riffed these movies because they were the most unintentionally hilarious movies they could find (its not easy to write a riff for just any movie). So its natural that their list would consist of movies they've riffed. Especially given the sheer volume of movies they've riffed.
Also, they haven't riffed Sex and the City 2 yet, my guess is their riff of Crossroads didn't sell well and that led them to believe that something like Sex and the City 2 wouldn't be worth the effort. But yes, the other six have rifftrax.
edited 5th Oct '12 5:21:12 AM by gibberingtroper