The Avatar series offers a great range of mystery as it explores the influence of eastern and western cultures on today's society. As far as the first Avatar they have been pretty mischievous but have you ever consider how similar they are?
Although, the similarities are almost identical, we can see that 'The Legend of Korra' has advanced technologically and culturally. She is one of the first non-caucasian avatar and her characterisation has explored the ideologies of homosexual relationship as seen through the last image.
What are other parallels that you have spotted in Avatar series?