Could this be the Next installment of everyone’s beloved Heroine Laura Croft? According to on Nov 21 Eidos filed to trademark Tomb Raider Underworld. The story is said to be based around the Mayan Calendar. During five days at the end of the calendar, called Wayeb, portals between the mortal realm and the Underworld dissolve, allowing ill-intending deities to cause disaster and mayhem.