"We're looking for a MacGuffin, which is an object that he goes after. They're very hard to come by!" the Daily Telegraph quoted George as saying. Indiana Jones and the Kingdom of the Crystal Skull, the fourth film in the famous franchise, directed by Steven Spielberg, had been released in May 2008 grossing over 785 million dollars worldwide.
On being questioned if Indy would be joined by his on-screen wife and son, the screenwriter said: "It really depends on what it is Indy goes looking for and then how the story falls out of that, and then how convenient or inconvenient to have the group there."