How cool will it be when we can tell a program, "I want a fantasy story that continues on Lord of the Rings and details Pippin and Merry's second great and wond

How cool will it be when we can tell a program, "I want a fantasy story that continues on Lord of the Rings and details Pippin and Merry's second great and wonderful adventure after Frodo left middle earth" and get a 300 page story that is well-written and inventive and fun to read. I know the requirements for something like that are extraordinarily high, but I could see it in 30-40 years being viable.