"Journey 3" is planned to be based on Jules Verne's book "From the Eath to the Moon", which Michael Caine's character passes on to Sean and Hank at the end of "Journey 2: The Mysterious Island". Producer Flynn said of the plan, "We've got a big, expansive adventure for them to go on based on that book, but it's not exactly what it seems."
On the other hand, director Payton told The Hollywood Reporter that the next "Journey" pic will be bigger than its predecessors. " 'Mysterious Island' was one of eight or nine really seminal works. I know we've just scratched the surface of what we can do. This one's going to be a lot bigger," the filmmaker stated.