As a movie buff, I have a couple of crazy theories myself (with reasons why it would work):
1. Zion is part of The Matrix. (It would explain why Neo can still use his powers in the physical world, though to this day, I still find Zion to be a complex impossibility)
2. Ferris Beuller was a figment of Cameron's imagination. (It would explain the city of Chicago rallying for Bueller's "illness" and the whole song-and-dance number in the downtown parade)
3. Chewbacca and R2-D2 are secret Rebel agents. (It would explain C-3PO's, but not R2's, memory wipe in the original trilogy. It would also explain why Chewbacca, a high-ranking soldier, would be friends with a lowlife smuggler like Han Solo)
Anyways, that's my take on it. What says you?