As for his own writing career, McCain said that he had no plans for a sequel to his own book -- "Faith of My Fathers" -- and boasted that the book had jumped from No. 9 to No. 6 on the New York Times best seller list this week.

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Harrison says he's at work on the screenplay for a sequel that producer New Amsterdam Entertainment likely will have him make as a single miniseries treating the next two books in Herbert's canon.

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For the most part, though, this sequel is as scattered as the first film and a lot more familiar.

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As for the rest of the franchise, Indiana Jones and the Temple of Doom was never a great sequel (although the fourth film made it look brilliant), but it was revolutionary in opening up the PG-13 rating.

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