I dare you to spend less than a half hour browsing Not Starring, a site that details the roles that the stars didn’t play. Was Jodie Foster really second choice to play Princess Leia? Sean Connery turned down Gandolf and Morpheus? Did Ewan MacGregor say no to Neo? I don’t know how verifiable any of this information is, (David Boreanaz turned down the lead in Batman Begins? Really?) but it’s still fascinating for the ‘what-if’ aspect.