So basically everyone where JWs don't even scratch the surface are screwed. Or the end is a long, long way away, assuming they are going to "preach" to these areas someday....
From JWFacts:
Being a Witness is predominantly contingent on where one is born and billions of people will never hear of the name Jehovah or Jesus. Living within the following countries - Bangladesh, Cambodia, China, India, Mali, Nepal, Niger, Pakistan, Thailand and Turkey are around 3 billion people, nearly half the global population. Yet the 2006 Watchtower Service Report showed that combined these have less than 40,000 Witnesses, not even 1 for every 70,000 people. These countries represent many religious (Muslim, Atheist, Buddhist and Hindu) and ethnic (African, Indian, Asian and European) backgrounds, showing that no particular group is genetically disposed to be "goat-like". In Pakistan and Bangladesh virtually all will be destroyed, the ratio of Witnesses to 'worldly people' is less than 1:1,000,000. In 2006, there was not a single Witness in Afghanistan. Is it fair for people who have never even heard of Jehovah to be destroyed at Armageddon?