1. Both are stories about underdogs who have been predestined to be the key players in the ultimate battle of good versus evil. Both accept their roles very grudgingly. Neither is physically imposing or exceptionally intelligent, but both have an innate courage and strength to persevere and complete their tasks.

2. Both are fighting the most powerful forces of evil of their time. Sauron and Voldemort are both omnipotent villains, who if victorious, would plunge the world into decay and darkness. Furthermore, both are disembodied as a result of a previous defeat - Sauron is a giant fiery eye...