And without the prequels, there could never be the "Jar Jar Binks theory".
Just because something is in the pop culture vernacular, doesn't mean it was good. South Park and The Simpsons have referenced the prequels, and not in a flattering way. Even though Lucas has given his blessing to Robot Chicken's parodies, they rip the prequels quite often.
Hold on, there was a Marmaduke movie?!