When sagas end, what do the fans do next?

Yesterday NPR's Talk of the Nation focused on the end of the Star Wars movies with a discussion of fan-generated works, including fanfic, fan art, fan films and vidding. Harry Potter was prominently discussed along with the two Star Wars trilogies and other
fan-intensive entertainment like Lord of the Rings, Star Trek, Buffy, and X-Files. You can listen to the show here - and thanks to Virgina for the tip!