Sam Worthington and every character who survived will return for the sequel.
Also, New Line and Walden Media are putting together the sequel to Journey to the Center of the Earth, but apparently Brendan Fraser is unsure about moving forward without director Eric Brevig who is busy filming Yogi Bear. The studio wants to make a fall, 2011 release date which would mean hiring another director to replace Brevig. New Line has suggested Brad Peyton, who would re-fashion the film around Josh Hutcherson, who played Fraser's character's son in the original film. Such a move would save an eight-figure star salary, but it is a major risk to go without a star to return to a film that grossed $242 million worldwide.