Princess Leia as a D.C. madam? The Blues Brothers as Amigos? Who wouldn't have wanted to see that?

We delve again into the hypothetical world where actors got the roles they missed out on. Where 'Mrs. Doubtfire' was a 'Home Improvement' adaptation, Jackie Chan ran into Big Trouble in Little China, and Sandra Bullock didn't become America's Sweetheart in 'Demolition Man'.