I used to like thinking about that but now that Bunheads is around I know that they would have said the same things they say on that show! I believe Fifty Shades of Grey was referenced as the end of literature.
There were Harry Potter references in Gilmore Girls. I would guess they would mention the movies coming to an end due to Kirk doing something crazy because of it or at some point the Black, White and Read Movie Theatre would be showing Part 2 like months after it actually came out!