But, with the upcoming movie Dune Messiah, he might be doing the opposite: cramming two books into one movie. A new casting rumor suggests that maybe, just maybe, Dune 3 will not just adapt the second Herbert Dune novel, but also draw upon aspects of the third book, the 1976 bestseller, Children of Dune. If remotely true, Dune Messiah will do something very similar to what the 2003 SyFy Channel adaptations did. Right now, we should take all casting rumors about Dune Messiah with several grains of spicy sand, but if this detail does prove to be true, it could mean Dune 3 might end up being the best and biggest Dune of them all. Dune Messiah does not have a confirmed release date.