Is Avatar a new classic or a plagiarized old one?

They say, “repetition is the father of learning.” Well… the story of Avatar is a visually stunning take on a story we have read, watched an enjoyed countless times in such movies as “The Last Samurai,” “Dances with Wolves,” and many others. However as uncovered, anyone who played Mad Libs as a child can create a masterpiece of their own.
Simple coincidence or blatant plagiarism?

*created by Matt Bateman. Source www.unrealitymag.com*
Your presentation of the subject matter is clever. I’m even more motivated to watch this one in 3-D!