Not really. There've been plenty of movies that are older, have had no follow up material and have had a much larger impact than Avatar did.
Plenty of films that have had sequels that still would have had a much larger impact than Avatar even without the sequels too.
That's another topic which would be interressitng to discuss about
"Quagmire, are you the type of guy who takes 'no' for an answer ?"
"My lawyer doesn't allow me to answer that question"
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